diff --git a/Apps/Terminal/main.vp b/Apps/Terminal/main.vp
index 8f24780..31f80b8 100644
--- a/Apps/Terminal/main.vp
+++ b/Apps/Terminal/main.vp
@@ -8,7 +8,7 @@ import vpsdk.stdio as stdio
 import string
 import viperlib
 from stdint import *
-import t, c
+
 
 @__attribute__(section(".text.startup"), aligned(16))
 export def _start() -> int:
diff --git a/Libs/SerialLogger/serial_logger.vp b/Libs/SerialLogger/serial_logger.vp
index d143968..8815a9f 100644
--- a/Libs/SerialLogger/serial_logger.vp
+++ b/Libs/SerialLogger/serial_logger.vp
@@ -1,7 +1,7 @@
 import vpsdk.devfs as devfs
-import t, c
 
-# S4：原先三次 SERIAL_PUTS 私有 syscall，现改为写 /dev/serial0 设备节点。
+
+
 export def log_info(msg: const str):
     devfs.serial_puts("[SerialLogger] ")
     devfs.serial_puts(msg)
diff --git a/vpsdk/dynlib.vp b/vpsdk/dynlib.vp
index 0b19f1b..5839413 100644
--- a/vpsdk/dynlib.vp
+++ b/vpsdk/dynlib.vp
@@ -5,7 +5,4 @@ def load_so(path: const str) -> uint64:
     return syscall._syscall1(uint64(syscall.Syscall.LOAD_SO), uint64(path))
 
 def so_call1(sym_name: const str, arg1: rawptr) -> int:
-    # arg1 只是原样交给系统调用的裸地址，故用 rawptr（未定/通配指针）而非 t.CPtr：
-    # 后者是具体类型的一级指针，调用方传字符串字面量（二级指针）会被判成级数不符
-    # （CastError: pointer level differs, source level 2 -> target level 1）。
     return int(syscall._syscall2(uint64(syscall.Syscall.SO_CALL1), uint64(sym_name), uint64(arg1)))