为什么 execute(`echo 中文`) 输出中文源码？

为什么 execute(echo 中文) 输出中文源码？

import win.ui;
/*DSG{{*/
var winform = win.form(text="管道演示";right=495;bottom=431;parent=...)
winform.add(
btnPing={cls="button";text="findstr";left=24;top=169;right=132;bottom=202;z=1};
edit={cls="edit";text="bbs";left=224;top=172;right=472;bottom=204;edge=1;z=6};
editInput={cls="edit";text=‘www.aardio.com\r\nwww.aardio.cn\r\nbbs.aardio.com‘;left=16;top=32;right=480;bottom=167;edge=1;multiline=1;z=2};
editOutput={cls="richedit";left=16;top=212;right=480;bottom=416;edge=1;hscroll=1;multiline=1;vscroll=1;z=3};
static={cls="static";text="输入字符串:";left=16;top=8;right=120;bottom=24;transparent=1;z=4};
static2={cls="static";text="启动参数：";left=136;top=177;right=208;bottom=193;align="right";transparent=1;z=5}
)
/*}}*/

winform.btnPing.oncommand = function(id,event){

    thread.invoke(
        function(winform){

            import process.popen;
            var prcs = process.popen(`node -p "console.log(‘123中文‘); console.log(24); setTimeout(console.log, 3000, 1234)"`); 

            //写数据到进程输入流
            prcs.writeClose(winform.editInput.text);

            //自进程获取输入数据
            winform.editOutput.text = string.fromto(prcs.read(-1),0,936); // 转换为 936 就不乱码了

            prcs.close(); 

        },winform
    ) 
}

winform.editOutput.oncommand = function(id,event){

}

winform.show() 
win.loopMessage();

execute

import io
io.open()

import string
var str = `node -p "console.log(‘123中文‘); console.log(24); setTimeout(console.log, 3000, 1234)"`
str = string.fromto(str,0,936); // 转换为 936 编码输出中文
execute(str)

import win
win.loopMessage()