Where can I find the SMS ID code on the subway parkour, the ninth anniversary?

The ninth anniversary exchange method is as follows:

1. Enter the main page of the game, and click Settings in the upper left corner to enter.

2. Find the option of redemption code on the Settings page. Click enter, and a box will pop up.

3. Enter a valid redemption code in the redemption code box page, and click the redemption button below to receive the props reward.