tcp-proxy-node/index.js

// const buf = Buffer.from('999', 'utf-8');
// console.log(buf.length);
// const hexString = buf.toString('hex');
// const hexbuf = Buffer.from(hexString.padStart(8, '0'), 'hex');
// console.log(hexbuf.toString('utf-8'));

// console.log(Buffer.from([0xcdbf3c]).toString('utf-8'));