There has been a lot of Chinese activity (infrastructure building like roadways and dams) in what is regarded as Kachin state over the past decade.Hope what you guys are saying is true, I don't have all that much knowledge on the Burmese internal politics issue, I just know the North of their country is engulfed in insurgencies, so their armed forces is mainly counter insurgency geared, not fighting another country's army.
This was resented by the ethnic Kachins and it led to a couple of attacks on Chinese built dams which in turn forced the Burmese Govt. to urge the KIA to join the Tatmadaw as border guards. The Kachins in turn claim Burma is using infrastructure security as an excuse to push their troops into their area, bringing Tatmadaw into LOS of KIA. The past decade has seen some conflict.
In the end, junta gayi bhaad mein, leader ko paisa milna chahiye.
China is throwing a lot of much needed money into Burma and bribes the leadership so they look the other way. Intent is obviously to get access to Bay of Bengal region and open another front with India.
China as of today wields enormous influence over North Burmese insurgent groups.
Let's see if the Burmese coup is to help the Chinese further their agenda in Burma or confront them. I suspect it could be the former if a lot of money has already changed hands amidst the overhang of the ongoing Sino-Indian conflict.