I have tow var looks like some string. but the output show unicode, and output1 show right charactor. All typeof is string.
const output = stdout.match(/"dst":"(.*)"/)[1];
log('xxx=>', output, typeof output); // xxx=>, \u6536\u5230, string
const output1 = '\u6536\u5230';
log('xxx=>', output1, typeof output1); // xxx=>, 收到, string
\ characters have special meaning (they are escape sequences) in string literals in JS source code.
They don't have special meaning in external input.