diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3bd6997f..3cd46db1 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,7 +4,7 @@
 # CMakeLists in this exact order for cmake to work correctly
 cmake_minimum_required(VERSION 3.16)
 
-set(PROJECT_VER "0.7.0")
+set(PROJECT_VER "0.7.1")
 
 include($ENV{IDF_PATH}/tools/cmake/project.cmake)
 project(xiaozhi)
diff --git a/main/CMakeLists.txt b/main/CMakeLists.txt
index 7917587a..ec389be3 100755
--- a/main/CMakeLists.txt
+++ b/main/CMakeLists.txt
@@ -2,11 +2,12 @@ set(SOURCES "audio_codec.cc"
             "audio_codecs/no_audio_codec.cc"
             "audio_codecs/box_audio_codec.cc"
             "display.cc"
-            "display/ssd1306_display.cc"
             "display/no_display.cc"
+            "display/st7789_display.cc"
+            "display/ssd1306_display.cc"
             "board.cc"
-            "boards/ml307_board.cc"
             "boards/wifi_board.cc"
+            "boards/ml307_board.cc"
             "system_info.cc"
             "system_reset.cc"
             "application.cc"
diff --git a/main/application.cc b/main/application.cc
index ee746c04..a7036aa4 100644
--- a/main/application.cc
+++ b/main/application.cc
@@ -356,23 +356,28 @@ void Application::SetChatState(ChatState state) {
     chat_state_ = state;
     ESP_LOGI(TAG, "STATE: %s", state_str[chat_state_]);
 
+    auto display = Board::GetInstance().GetDisplay();
     auto builtin_led = Board::GetInstance().GetBuiltinLed();
     switch (chat_state_) {
         case kChatStateUnknown:
         case kChatStateIdle:
             builtin_led->TurnOff();
+            display->SetText("I'm\nIdle.");
             break;
         case kChatStateConnecting:
             builtin_led->SetBlue();
             builtin_led->TurnOn();
+            display->SetText("I'm\nConnecting...");
             break;
         case kChatStateListening:
             builtin_led->SetRed();
             builtin_led->TurnOn();
+            display->SetText("I'm\nListening...");
             break;
         case kChatStateSpeaking:
             builtin_led->SetGreen();
             builtin_led->TurnOn();
+            display->SetText("I'm\nSpeaking...");
             break;
         case kChatStateWakeWordDetected:
             builtin_led->SetBlue();
diff --git a/main/audio_codecs/box_audio_codec.cc b/main/audio_codecs/box_audio_codec.cc
index 4e26f835..bd0a7f1b 100644
--- a/main/audio_codecs/box_audio_codec.cc
+++ b/main/audio_codecs/box_audio_codec.cc
@@ -5,7 +5,8 @@
 
 static const char TAG[] = "BoxAudioCodec";
 
-BoxAudioCodec::BoxAudioCodec(void* i2c_master_handle, int input_sample_rate, int output_sample_rate, gpio_num_t mclk, gpio_num_t bclk, gpio_num_t ws, gpio_num_t dout, gpio_num_t din,
+BoxAudioCodec::BoxAudioCodec(void* i2c_master_handle, int input_sample_rate, int output_sample_rate,
+    gpio_num_t mclk, gpio_num_t bclk, gpio_num_t ws, gpio_num_t dout, gpio_num_t din,
     gpio_num_t pa_pin, uint8_t es8311_addr, uint8_t es7210_addr, bool input_reference) {
     duplex_ = true; // 是否双工
     input_reference_ = input_reference; // 是否使用参考输入，实现回声消除
diff --git a/main/audio_codecs/box_audio_codec.h b/main/audio_codecs/box_audio_codec.h
index 173dac52..3c793ad4 100644
--- a/main/audio_codecs/box_audio_codec.h
+++ b/main/audio_codecs/box_audio_codec.h
@@ -29,7 +29,8 @@ private:
     virtual int Write(const int16_t* data, int samples) override;
 
 public:
-    BoxAudioCodec(void* i2c_master_handle, int input_sample_rate, int output_sample_rate, gpio_num_t mclk, gpio_num_t bclk, gpio_num_t ws, gpio_num_t dout, gpio_num_t din,
+    BoxAudioCodec(void* i2c_master_handle, int input_sample_rate, int output_sample_rate,
+        gpio_num_t mclk, gpio_num_t bclk, gpio_num_t ws, gpio_num_t dout, gpio_num_t din,
         gpio_num_t pa_pin, uint8_t es8311_addr, uint8_t es7210_addr, bool input_reference);
     virtual ~BoxAudioCodec();
 
diff --git a/main/boards/kevin-box-0/kevin_box_board.cc b/main/boards/kevin-box-0/kevin_box_board.cc
index a57952af..a2cdc751 100644
--- a/main/boards/kevin-box-0/kevin_box_board.cc
+++ b/main/boards/kevin-box-0/kevin_box_board.cc
@@ -181,6 +181,7 @@ public:
 
     virtual bool GetBatteryVoltage(int &voltage, bool& charging) override {
         ESP_ERROR_CHECK(adc_oneshot_get_calibrated_result(adc1_handle_, adc1_cali_handle_, ADC_CHANNEL_0, &voltage));
+        voltage *= 3;
         charging = false;
         ESP_LOGI(TAG, "Battery voltage: %d, Charging: %d", voltage, charging);
         return true;
diff --git a/main/boards/kevin-box-1/kevin_box_board.cc b/main/boards/kevin-box-1/kevin_box_board.cc
index d8629f5b..03b386ae 100644
--- a/main/boards/kevin-box-1/kevin_box_board.cc
+++ b/main/boards/kevin-box-1/kevin_box_board.cc
@@ -191,6 +191,7 @@ public:
 
     virtual bool GetBatteryVoltage(int &voltage, bool& charging) override {
         ESP_ERROR_CHECK(adc_oneshot_get_calibrated_result(adc1_handle_, adc1_cali_handle_, ADC_CHANNEL_0, &voltage));
+        voltage *= 3;
         charging = gpio_get_level(GPIO_NUM_2) == 0;
         ESP_LOGI(TAG, "Battery voltage: %d, Charging: %d", voltage, charging);
         return true;
diff --git a/main/boards/lichuang-dev/config.h b/main/boards/lichuang-dev/config.h
index 7896ac2f..57581bef 100644
--- a/main/boards/lichuang-dev/config.h
+++ b/main/boards/lichuang-dev/config.h
@@ -16,7 +16,6 @@
 #define AUDIO_I2S_GPIO_DOUT GPIO_NUM_45
 
 #define AUDIO_CODEC_USE_PCA9557
-#define AUDIO_CODEC_PA_PIN       GPIO_NUM_40
 #define AUDIO_CODEC_I2C_SDA_PIN  GPIO_NUM_1
 #define AUDIO_CODEC_I2C_SCL_PIN  GPIO_NUM_2
 #define AUDIO_CODEC_ES8311_ADDR  ES8311_CODEC_DEFAULT_ADDR
@@ -27,11 +26,9 @@
 #define VOLUME_UP_BUTTON_GPIO   GPIO_NUM_NC
 #define VOLUME_DOWN_BUTTON_GPIO GPIO_NUM_NC
 
-#define DISPLAY_SDA_PIN GPIO_NUM_NC
-#define DISPLAY_SCL_PIN GPIO_NUM_NC
-#define DISPLAY_WIDTH   128
-#define DISPLAY_HEIGHT  64
-#define DISPLAY_MIRROR_X false
+#define DISPLAY_WIDTH   320
+#define DISPLAY_HEIGHT  240
+#define DISPLAY_MIRROR_X true
 #define DISPLAY_MIRROR_Y false
 
 
diff --git a/main/boards/lichuang-dev/lichuang_dev_board.cc b/main/boards/lichuang-dev/lichuang_dev_board.cc
index 30321100..e133f435 100644
--- a/main/boards/lichuang-dev/lichuang_dev_board.cc
+++ b/main/boards/lichuang-dev/lichuang_dev_board.cc
@@ -1,19 +1,21 @@
 #include "boards/wifi_board.h"
 #include "audio_codecs/box_audio_codec.h"
-#include "display/no_display.h"
+#include "display/st7789_display.h"
 #include "application.h"
 #include "button.h"
 #include "led.h"
 #include "config.h"
 
 #include <esp_log.h>
+#include <esp_lcd_panel_vendor.h>
 #include <driver/i2c_master.h>
-
+#include <driver/spi_common.h>
 #define TAG "LichuangDevBoard"
 
 class LichuangDevBoard : public WifiBoard {
 private:
     i2c_master_bus_handle_t i2c_bus_;
+    i2c_master_dev_handle_t pca9557_handle_;
     Button boot_button_;
 
     void InitializeI2c() {
@@ -33,25 +35,48 @@ private:
         ESP_ERROR_CHECK(i2c_new_master_bus(&i2c_bus_cfg, &i2c_bus_));
     }
 
+    void Pca9557ReadRegister(uint8_t addr, uint8_t* data) {
+        uint8_t tmp[1] = {addr};
+        ESP_ERROR_CHECK(i2c_master_transmit_receive(pca9557_handle_, tmp, 1, data, 1, 100));
+    }
+
+    void Pca9557WriteRegister(uint8_t addr, uint8_t data) {
+        uint8_t tmp[2] = {addr, data};
+        ESP_ERROR_CHECK(i2c_master_transmit(pca9557_handle_, tmp, 2, 100));
+    }
+
+    void Pca9557SetOutputState(uint8_t bit, uint8_t level) {
+        uint8_t data;
+        Pca9557ReadRegister(0x01, &data);
+        data = (data & ~(1 << bit)) | (level << bit);
+        Pca9557WriteRegister(0x01, data);
+    }
+
     void InitializePca9557() {
         i2c_device_config_t pca9557_cfg = {
             .dev_addr_length = I2C_ADDR_BIT_LEN_7,
             .device_address = 0x19,
-            .scl_speed_hz = 400000,
+            .scl_speed_hz = 100000,
             .scl_wait_us = 0,
             .flags = {
                 .disable_ack_check = 0,
             },
         };
-        i2c_master_dev_handle_t pca9557_handle;
-        ESP_ERROR_CHECK(i2c_master_bus_add_device(i2c_bus_, &pca9557_cfg, &pca9557_handle));
-        assert(pca9557_handle != NULL);
-        auto pca9557_set_register = [](i2c_master_dev_handle_t pca9557_handle, uint8_t data_addr, uint8_t data) {
-            uint8_t data_[2] = {data_addr, data};
-            ESP_ERROR_CHECK(i2c_master_transmit(pca9557_handle, data_, 2, 50));
-        };
-        pca9557_set_register(pca9557_handle, 0x03, 0xfd);
-        pca9557_set_register(pca9557_handle, 0x01, 0x02);
+        ESP_ERROR_CHECK(i2c_master_bus_add_device(i2c_bus_, &pca9557_cfg, &pca9557_handle_));
+        assert(pca9557_handle_ != NULL);
+        Pca9557WriteRegister(0x01, 0x03);
+        Pca9557WriteRegister(0x03, 0xf8);
+    }
+
+    void InitializeSpi() {
+        spi_bus_config_t buscfg = {};
+        buscfg.mosi_io_num = GPIO_NUM_40;
+        buscfg.miso_io_num = GPIO_NUM_NC;
+        buscfg.sclk_io_num = GPIO_NUM_41;
+        buscfg.quadwp_io_num = GPIO_NUM_NC;
+        buscfg.quadhd_io_num = GPIO_NUM_NC;
+        buscfg.max_transfer_sz = DISPLAY_WIDTH * DISPLAY_HEIGHT * sizeof(uint16_t);
+        ESP_ERROR_CHECK(spi_bus_initialize(SPI3_HOST, &buscfg, SPI_DMA_CH_AUTO));
     }
 
     void InitializeButtons() {
@@ -68,6 +93,7 @@ public:
         ESP_LOGI(TAG, "Initializing LichuangDevBoard");
         InitializeI2c();
         InitializePca9557();
+        InitializeSpi();
         InitializeButtons();
         WifiBoard::Initialize();
     }
@@ -82,15 +108,47 @@ public:
         if (audio_codec == nullptr) {
             audio_codec = new BoxAudioCodec(i2c_bus_, AUDIO_INPUT_SAMPLE_RATE, AUDIO_OUTPUT_SAMPLE_RATE,
                 AUDIO_I2S_GPIO_MCLK, AUDIO_I2S_GPIO_BCLK, AUDIO_I2S_GPIO_WS, AUDIO_I2S_GPIO_DOUT, AUDIO_I2S_GPIO_DIN,
-                AUDIO_CODEC_PA_PIN, AUDIO_CODEC_ES8311_ADDR, AUDIO_CODEC_ES7210_ADDR, AUDIO_INPUT_REFERENCE);
-            audio_codec->SetOutputVolume(AUDIO_DEFAULT_OUTPUT_VOLUME);
+                GPIO_NUM_NC, AUDIO_CODEC_ES8311_ADDR, AUDIO_CODEC_ES7210_ADDR, AUDIO_INPUT_REFERENCE);
+            // audio_codec->SetOutputVolume(AUDIO_DEFAULT_OUTPUT_VOLUME);
         }
         return audio_codec;
     }
 
     virtual Display* GetDisplay() override {
-        static NoDisplay display;
-        return &display;
+        static St7789Display* display = nullptr;
+        if (display == nullptr) {
+            esp_lcd_panel_io_handle_t panel_io = nullptr;
+            esp_lcd_panel_handle_t panel = nullptr;
+            // 液晶屏控制IO初始化
+            ESP_LOGD(TAG, "Install panel IO");
+            esp_lcd_panel_io_spi_config_t io_config = {};
+            io_config.cs_gpio_num = GPIO_NUM_NC;
+            io_config.dc_gpio_num = GPIO_NUM_39;
+            io_config.spi_mode = 2;
+            io_config.pclk_hz = 80 * 1000 * 1000;
+            io_config.trans_queue_depth = 10;
+            io_config.lcd_cmd_bits = 8;
+            io_config.lcd_param_bits = 8;
+            ESP_ERROR_CHECK(esp_lcd_new_panel_io_spi(SPI3_HOST, &io_config, &panel_io));
+
+            // 初始化液晶屏驱动芯片ST7789
+            ESP_LOGD(TAG, "Install LCD driver");
+            esp_lcd_panel_dev_config_t panel_config = {};
+            panel_config.reset_gpio_num = GPIO_NUM_NC;
+            panel_config.rgb_ele_order = LCD_RGB_ELEMENT_ORDER_RGB;
+            panel_config.bits_per_pixel = 16;
+            ESP_ERROR_CHECK(esp_lcd_new_panel_st7789(panel_io, &panel_config, &panel));
+            
+            esp_lcd_panel_reset(panel);
+            Pca9557SetOutputState(0, 0);
+
+            esp_lcd_panel_init(panel);
+            esp_lcd_panel_invert_color(panel, true);
+            esp_lcd_panel_swap_xy(panel, true);
+            esp_lcd_panel_mirror(panel, DISPLAY_MIRROR_X, DISPLAY_MIRROR_Y);
+            display = new St7789Display(panel_io, panel, GPIO_NUM_42, DISPLAY_WIDTH, DISPLAY_HEIGHT, DISPLAY_MIRROR_X, DISPLAY_MIRROR_Y);
+        }
+        return display;
     }
 };
 
diff --git a/main/display.cc b/main/display.cc
index 51a1a72d..93a9a1da 100644
--- a/main/display.cc
+++ b/main/display.cc
@@ -18,12 +18,14 @@ void Display::SetupUI() {
     Lock();
     label_ = lv_label_create(lv_disp_get_scr_act(disp_));
     // lv_obj_set_style_text_font(label_, font_, 0);
+    lv_obj_set_style_text_color(label_, lv_color_black(), 0);
     lv_label_set_text(label_, "Initializing...");
     lv_obj_set_width(label_, disp_->driver->hor_res);
     lv_obj_set_height(label_, disp_->driver->ver_res);
 
     notification_ = lv_label_create(lv_disp_get_scr_act(disp_));
     // lv_obj_set_style_text_font(notification_, font_, 0);
+    lv_obj_set_style_text_color(notification_, lv_color_black(), 0);
     lv_label_set_text(notification_, "Notification\nTest");
     lv_obj_set_width(notification_, disp_->driver->hor_res);
     lv_obj_set_height(notification_, disp_->driver->ver_res);
@@ -106,7 +108,7 @@ void Display::ShowNotification(const std::string &text) {
 
 void Display::UpdateDisplay() {
     auto chat_state = Application::GetInstance().GetChatState();
-    if (chat_state == kChatStateIdle || chat_state == kChatStateConnecting || chat_state == kChatStateListening) {
+    if (chat_state == kChatStateIdle) {
         std::string text;
         auto& board = Board::GetInstance();
         std::string network_name;
diff --git a/main/display/st7789_display.cc b/main/display/st7789_display.cc
new file mode 100644
index 00000000..e38574e7
--- /dev/null
+++ b/main/display/st7789_display.cc
@@ -0,0 +1,123 @@
+#include "st7789_display.h"
+
+#include <esp_log.h>
+#include <esp_err.h>
+#include <esp_lvgl_port.h>
+#include <driver/ledc.h>
+#include <vector>
+
+#define TAG "St7789Display"
+#define LCD_LEDC_CH LEDC_CHANNEL_0
+
+St7789Display::St7789Display(esp_lcd_panel_io_handle_t panel_io, esp_lcd_panel_handle_t panel, gpio_num_t backlight_pin,
+                           int width, int height, bool mirror_x, bool mirror_y)
+    : panel_io_(panel_io), panel_(panel), mirror_x_(mirror_x), mirror_y_(mirror_y) {
+    width_ = width;
+    height_ = height;
+
+    ESP_LOGI(TAG, "Initialize LVGL");
+    lvgl_port_cfg_t port_cfg = ESP_LVGL_PORT_INIT_CONFIG();
+    lvgl_port_init(&port_cfg);
+
+    InitializeBacklight(backlight_pin);
+
+    // draw white
+    std::vector<uint16_t> buffer(width_, 0xFFFF);
+    for (int y = 0; y < height_; y++) {
+        esp_lcd_panel_draw_bitmap(panel_, 0, y, width_, y + 1, buffer.data());
+    }
+
+    // Set the display to on
+    ESP_LOGI(TAG, "Turning display on");
+    ESP_ERROR_CHECK(esp_lcd_panel_disp_on_off(panel_, true));
+
+    ESP_LOGI(TAG, "Adding LCD screen");
+    const lvgl_port_display_cfg_t display_cfg = {
+        .io_handle = panel_io_,
+        .panel_handle = panel_,
+        .control_handle = nullptr,
+        .buffer_size = static_cast<uint32_t>(width_ * 20),
+        .double_buffer = false,
+        .trans_size = 0,
+        .hres = static_cast<uint32_t>(width_),
+        .vres = static_cast<uint32_t>(height_),
+        .monochrome = false,
+        .rotation = {
+            .swap_xy = true,
+            .mirror_x = mirror_x_,
+            .mirror_y = mirror_y_,
+        },
+        .flags = {
+            .buff_dma = 0,
+            .buff_spiram = 1,
+            .sw_rotate = 0,
+            .full_refresh = 0,
+            .direct_mode = 0,
+        },
+    };
+
+    disp_ = lvgl_port_add_disp(&display_cfg);
+
+    SetBacklight(100);
+}
+
+St7789Display::~St7789Display() {
+    if (panel_ != nullptr) {
+        esp_lcd_panel_del(panel_);
+    }
+    if (panel_io_ != nullptr) {
+        esp_lcd_panel_io_del(panel_io_);
+    }
+    lvgl_port_deinit();
+}
+
+void St7789Display::InitializeBacklight(gpio_num_t backlight_pin) {
+    if (backlight_pin == GPIO_NUM_NC) {
+        return;
+    }
+
+    // Setup LEDC peripheral for PWM backlight control
+    const ledc_channel_config_t backlight_channel = {
+        .gpio_num = backlight_pin,
+        .speed_mode = LEDC_LOW_SPEED_MODE,
+        .channel = LCD_LEDC_CH,
+        .intr_type = LEDC_INTR_DISABLE,
+        .timer_sel = LEDC_TIMER_0,
+        .duty = 0,
+        .hpoint = 0,
+        .flags = {
+            .output_invert = true
+        }
+    };
+    const ledc_timer_config_t backlight_timer = {
+        .speed_mode = LEDC_LOW_SPEED_MODE,
+        .duty_resolution = LEDC_TIMER_10_BIT,
+        .timer_num = LEDC_TIMER_0,
+        .freq_hz = 5000,
+        .clk_cfg = LEDC_AUTO_CLK,
+        .deconfigure = false
+    };
+
+    ESP_ERROR_CHECK(ledc_timer_config(&backlight_timer));
+    ESP_ERROR_CHECK(ledc_channel_config(&backlight_channel));
+}
+
+void St7789Display::SetBacklight(uint8_t brightness) {
+    if (brightness > 100) {
+        brightness = 100;
+    }
+
+    ESP_LOGI(TAG, "Setting LCD backlight: %d%%", brightness);
+    // LEDC resolution set to 10bits, thus: 100% = 1023
+    uint32_t duty_cycle = (1023 * brightness) / 100;
+    ESP_ERROR_CHECK(ledc_set_duty(LEDC_LOW_SPEED_MODE, LCD_LEDC_CH, duty_cycle));
+    ESP_ERROR_CHECK(ledc_update_duty(LEDC_LOW_SPEED_MODE, LCD_LEDC_CH));
+}
+
+void St7789Display::Lock() {
+    lvgl_port_lock(0);
+}
+
+void St7789Display::Unlock() {
+    lvgl_port_unlock();
+}
diff --git a/main/display/st7789_display.h b/main/display/st7789_display.h
new file mode 100644
index 00000000..cef6a073
--- /dev/null
+++ b/main/display/st7789_display.h
@@ -0,0 +1,29 @@
+#ifndef ST7789_DISPLAY_H
+#define ST7789_DISPLAY_H
+
+#include "display.h"
+
+#include <driver/gpio.h>
+#include <esp_lcd_panel_io.h>
+#include <esp_lcd_panel_ops.h>
+
+class St7789Display : public Display {
+private:
+    esp_lcd_panel_io_handle_t panel_io_ = nullptr;
+    esp_lcd_panel_handle_t panel_ = nullptr;
+    bool mirror_x_ = false;
+    bool mirror_y_ = false;
+
+    void InitializeBacklight(gpio_num_t backlight_pin);
+    void SetBacklight(uint8_t brightness);
+
+    virtual void Lock() override;
+    virtual void Unlock() override;
+
+public:
+    St7789Display(esp_lcd_panel_io_handle_t panel_io, esp_lcd_panel_handle_t panel, gpio_num_t backlight_pin,
+                  int width, int height, bool mirror_x, bool mirror_y);
+    ~St7789Display();
+};
+
+#endif // ST7789_DISPLAY_H
diff --git a/sdkconfig.defaults b/sdkconfig.defaults
index 46f0bf70..d4889182 100644
--- a/sdkconfig.defaults
+++ b/sdkconfig.defaults
@@ -16,3 +16,6 @@ CONFIG_USE_MULTINET=n
 
 CONFIG_FREERTOS_GENERATE_RUN_TIME_STATS=y
 CONFIG_FREERTOS_USE_STATS_FORMATTING_FUNCTIONS=y
+
+CONFIG_LV_COLOR_16_SWAP=y
+CONFIG_LV_MEM_CUSTOM=y