The method of downloading two QQ softwares is as follows:
QQ applications can be added at 1. Knox mode, and QQ software can also be used in normal mode, so you can install two QQ software.
Search for "Samsung my knox" through the "Samsung App Store" or "Galaxy Special Customization" that comes with the phone (some models support this function). After my Knox software is installed, click the menu in the upper right corner of the login Knox interface, select "Add Application" and check "QQ" to add it.
2. If your machine doesn't support Knox, you can download and install different versions of QQ software to install two QQ software.