AHC: State of Jaxa survives to at least 1700

In 1665, a country called Jaxa was founded along the Amur river by a Polish nobleman named Nicefor Czernichowski. However, twenty years later, it was conquered by the Qing dynasty.

Your challenge is to have Jaxa survive until at least 1700.
 
Firstly, they need to keep gaining the trust of small, local tribes, and need to continue the practice of pitting Russia and China against each other.

IOTL, Jaxa gave tribute to the Czar, effectively making the state a protectorate of Russia. Therefore, when the Qing went to war with Russia over control of the Amur River, they attacked Jaxa as a part of Russia. ITTL, Jaxa gives tribute to the Qing instead, and end up on the winning side of the fight over the Amur. They would still need to hire raids from local tribes clandestinely, and would still remain fairly neutral (read: diplomacy sl*t) for the next couple decades, remaining in the good graces of both sides.

By the year 1700, they have become wealthier and larger than they had ever been. The thing is, the Russians, while strong in Europe, were still trying to figure out colonization in the Eastern front, and would have easily been pushed back a ways by the Jaxa and their Tungusic allies.
 
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