../../../device/xradio/xr806/ohosdemo/LED/main.c:17:1: error: unknown type name '\U0000200b'
   17 | ​    IoTGpioSetOutputVal(GPIO_ID_PA21, 1);                                      //(5)输出高电平
      |  
../../../device/xradio/xr806/ohosdemo/LED/main.c:8:22: error: expected declaration specifiers or '...' before numeric constant
    8 | #define GPIO_ID_PA21 21
      |                      ^~
../../../device/xradio/xr806/ohosdemo/LED/main.c:17:28: note: in expansion of macro 'GPIO_ID_PA21'
   17 | ​    IoTGpioSetOutputVal(GPIO_ID_PA21, 1);                                      //(5)输出高电平
      |                         ^~~~~~~~~~~~
../../../device/xradio/xr806/ohosdemo/LED/main.c:17:42: error: expected declaration specifiers or '...' before numeric constant
   17 | ​    IoTGpioSetOutputVal(GPIO_ID_PA21, 1);                                      //(5)输出高电平
      |                                       ^
../../../device/xradio/xr806/ohosdemo/LED/main.c:18:1: error: unknown type name '\U0000200b'
   18 | ​    OS_MSleep(500);
      |  
../../../device/xradio/xr806/ohosdemo/LED/main.c:18:18: error: expected declaration specifiers or '...' before numeric constant
   18 | ​    OS_MSleep(500);
      |               ^~~
../../../device/xradio/xr806/ohosdemo/LED/main.c:19:1: error: unknown type name '\U0000200b'
   19 | ​    IoTGpioSetOutputVal(GPIO_ID_PA21, 0);                                      //(6)输出高电平
      |  
../../../device/xradio/xr806/ohosdemo/LED/main.c:8:22: error: expected declaration specifiers or '...' before numeric constant
    8 | #define GPIO_ID_PA21 21
      |                      ^~
../../../device/xradio/xr806/ohosdemo/LED/main.c:19:28: note: in expansion of macro 'GPIO_ID_PA21'
   19 | ​    IoTGpioSetOutputVal(GPIO_ID_PA21, 0);                                      //(6)输出高电平
      |                         ^~~~~~~~~~~~
../../../device/xradio/xr806/ohosdemo/LED/main.c:19:42: error: expected declaration specifiers or '...' before numeric constant
   19 | ​    IoTGpioSetOutputVal(GPIO_ID_PA21, 0);                                      //(6)输出高电平
      |                                       ^
../../../device/xradio/xr806/ohosdemo/LED/main.c:20:1: error: unknown type name '\U0000200b'
   20 | ​    OS_MSleep(500);
      |  
../../../device/xradio/xr806/ohosdemo/LED/main.c:20:18: error: expected declaration specifiers or '...' before numeric constant
   20 | ​    OS_MSleep(500);
      |               ^~~
../../../device/xradio/xr806/ohosdemo/LED/main.c: In function 'LEDMain':
../../../device/xradio/xr806/ohosdemo/LED/main.c:28:1: error: '\U0000200b' undeclared (first use in this function)
   28 | ​        OS_THREAD_PRIO_APP, 4 * 1024) != OS_OK) {
      |  
../../../device/xradio/xr806/ohosdemo/LED/main.c:28:1: note: each undeclared identifier is reported only once for each function it appears in
../../../device/xradio/xr806/ohosdemo/LED/main.c:28:4: error: expected ')' before 'OS_PRIORITY_NORMAL'
   28 | ​        OS_THREAD_PRIO_APP, 4 * 1024) != OS_OK) {
      | ^
      | )
../../../device/xradio/xr806/ohosdemo/LED/main.c:27:7: error: too few arguments to function 'OS_ThreadCreate'
   27 |   if (OS_ThreadCreate(&g_main_thread, "MainThread", MainThread, NULL,
      |       ^~~~~~~~~~~~~~~
In file included from ../../../device/xradio/xr806/xr_skylark/include/kernel/os/os.h:34,
                 from ../../../device/xradio/xr806/ohosdemo/LED/main.c:3:
../../../device/xradio/xr806/xr_skylark/include/kernel/os/os_thread.h:92:11: note: declared here
   92 | OS_Status OS_ThreadCreate(OS_Thread_t *thread, const char *name,
      |           ^~~~~~~~~~~~~~~
../../../device/xradio/xr806/ohosdemo/LED/main.c:29:4: error: expected ';' before 'printf'
   29 | ​    printf("[ERR] Create MainThread Failed\n");
      | ^   ~~~~~~
      | ;
[101/252] gcc cross compiler obj/kernel/liteos_m/kal/posix/src/libposix.time.o

尝试了下把17行前边的字符全删了，重新编译不报错了
如法炮制把其他出错行搞了下，成功编译
感觉是官网代码拷贝的时候混入了奇怪的字符，特发帖提醒下各位(吐槽下)