Jokingly saying no: "Mom doesn't let me add anyone on wechat." This playful tone rejects others to avoid embarrassment.
Delay refusal method: Excuse your mobile phone problems, next time to add friends.
Euphemism: Make it clear that you don't use wechat to chat and express your apology.
1. Joking rejection method
Reject someone jokingly. For example: "Mom/Dad doesn't let me add just anyone on wechat." Although this may seem naive, it avoids the awkwardness of saying no to someone explicitly.
2. Delay rejection method
You can use an excuse to say that your mobile phone is overdue or no electricity, and you can't add friends to each other for the time being, and you will have the opportunity to add wechat in the future. Although this reason is a bit far-fetched, the other person will know what you mean. This will also prevent the situation from becoming awkward.
3. Euphemism
You can say that you don't use wechat much, or don't use wechat to chat, and express apologies in a timely manner. This way will make the other person understand you immediately, and it also shows your courtesy.