Why is there no sound in Shandong Health Code Golden Shield?

Shandong Health Code Golden Shield has no sound, which is caused by the mute of mobile phone or the sound of health code turned off. The operation method is as follows.

Equipment: iPhone 12

System: iOS 14

Software: WeChat 8.0. 13

1. After opening WeChat on your mobile phone, click me, as shown below.

2. Then, in the personal center page that opens, click Pay.

3. Then on the payment page that opens, click the epidemic prevention health code.

4. Finally, in the opened page, click the voice button on the right side of the health code to broadcast the voice again.