What is the 4-digit JD.COM return claim code?

It's four digits in the message sent to me by the courier company. According to the query life knowledge network, a four-digit pick-up code will pop up on the page of return and refund, which is the four-digit pick-up code in the short message sent to me by the courier company. When the courier picks up the piece, he can tell the other party to pick up the piece code.