Is it possible to mix open and closed exercises?

Zhineng Qigong Knowledge

This is not to be recommended. This can lead to unexpected problems.

You cannot open and close a door at the same time. This sends contradictory signals to your own body and leads nowhere.

You should decide which line to follow and practise it. It is better to really learn one qigong system than to try out many different styles simultaneously.

Here many is not better, but less is often more.