kingdom of tungning

Your challenge is pretty much exactly what the title says: prevent the Kingdom of Tungning from getting annexed by the Qing dynasty or another power for as long as you can.

In an alternate scenerio, what if the Kingdom of Tungning was never annexed you the Qing Dynasty, and survives into the beginning of the 19th century. Few questions: How would the Kingdom of Tungning react the changing times? How would they react to the First and Second Opium Wars? Or...