diff --git a/docs/Advanced_development/zh/QuecPythonSub/LCD.md b/docs/Advanced_development/zh/QuecPythonSub/LCD.md
index 0c34a38e182e92fd831e09cb0433b079563db274..be88ff235e15cc079fc81fa492030263f26e33fc 100644
--- a/docs/Advanced_development/zh/QuecPythonSub/LCD.md
+++ b/docs/Advanced_development/zh/QuecPythonSub/LCD.md
@@ -6,6 +6,7 @@
 | ---- | ---------- | ------- | ------------------------ |
 | 1.0  | 2021-10-06 | Grey.Tu | 初版                     |
 | 1.1  | 2022-01-14 | Grey.Tu | 修复例程代码不能下载问题 |
+| 1.2  | 2022-05-26 | Grey.Tu | 修复已知问题             |
 
 本片文章主要基于 EC600x 介绍 LCD 显示，做一个 LCD 显示的小实验。
 
@@ -226,7 +227,7 @@ lcd_set_display_area = (
 lcd = LCD()  														# create object
 lcd_init_data = bytearray(init_data)  								# Conversion initialization parameter array
 lcd_invalid = bytearray(lcd_set_display_area)  						# Conversion area setting parameter array
-self.lcd.lcd_init(lcd_init_data, screen_high, screen_wide,
+lcd.lcd_init(lcd_init_data, screen_high, screen_wide,
                   6500, 1, 4, 0, lcd_invalid, None, None, None)  	# Initialize LCD screen
 ```
 
diff --git a/docs/Advanced_development/zh/QuecPythonSub/code/LCD_file.rar b/docs/Advanced_development/zh/QuecPythonSub/code/LCD_file.rar
deleted file mode 100644
index de02cb7575b4a7cd7ab5a03f36bff6f3ab3af6d7..0000000000000000000000000000000000000000
Binary files a/docs/Advanced_development/zh/QuecPythonSub/code/LCD_file.rar and /dev/null differ