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diff --git a/doc/platform_phytium_pi.md b/doc/platform_phytium_pi.md
index 9e9e9684d3..e748747d68 100644
--- a/doc/platform_phytium_pi.md
+++ b/doc/platform_phytium_pi.md
@@ -6,8 +6,20 @@ First, we need `ostool` to build and upload the image to the board. It also supp
 cargo install ostool
 ```
 
+If use windows, you need to install `docker-desktop`.
+
 We also need to connect the board to the computer with serial port, and connect netwire to the board. The host pc and the board should be in the same network.
 
+The pins of a USB to serial adapter need to be connected to the debugging serial port of the development board using jumper wires, noting that the receive and transmit lines should cross-connect:
+
+a. Connect the GND (ground) pin of the USB to TTL module to the GND (ground) pin of the development board (pin 12).
+
+b. Connect the RX (receive) pin of the USB to TTL module to the TX (transmit) pin of the development board (pin 8).
+
+c. Connect the TX (transmit) pin of the USB to TTL module to the RX (receive) pin of the development board (pin 10).
+
+![uart](./figures/phytium_uart.png)
+
 Then, we can run it easily.
 
 ```bash
@@ -15,14 +27,6 @@ Then, we can run it easily.
 ostool run uboot
 ```
 
-![select](./figures/phytium_select_platform.png)
-
-Then, press `1` and `enter` to select phytium pi.
-
-![select](./figures/phytium_select_app.png)
-
-Then, select app you want to run. Item without `arceos-*` are not app and can not run. Here we select `arceos-helloworld` for test.
-
 ![select](./figures/phytium_select_dtb.png)
 
 We can ignore select dtb step by pressing `enter` directly. ArceOS dose not support dtb yet.