1. Open Alipay and click "My" in the menu bar below.
2. Enter the "My" interface and click "Alipay Member".
3. Enter the "Alipay Member" interface, find "Zhihu Salt Member Zhou Ka" in "Quality Life" and click Enter.
4. Enter your mobile phone number at the bottom of the interface and click "Redeem Now".
5. Then click "Confirm Redemption". (Need to consume 500 points)