After voluntarily quitting WeChat group: WeChat group and chat records will be deleted, and the server will not save any chat records of users; If the WeChat group is removed, the previous chat records can be viewed, and the subsequent chat records can not be received or seen.
Wechat chat records can be restored. According to the principle of data deletion, the deleted WeChat chat records still exist in our mobile phones, because the database has not been completely physically deleted, but they are marked as "deleted" and the location occupied by this part of data is also marked as "occupied". This means that when new data is written into the mobile phone, it will be randomly overwritten at this marked position.