Can't any country manage North Myanmar well?

North Myanmar belongs to Myanmar and is managed by Myanmar.

North Myanmar, also known as "Upper Myanmar", is mainly composed of Magway, Mandalay, Sagaing and other provinces and states such as Qin, Kai, Shan and Kachin. Shan State is the main migration place of Yunnan immigrants from China in history, and it is also a complex and sensitive area. In the 4th and 5th centuries BC, the Silk Road on the southwest land, known as the "Poisonous Road of Shu Body", was successfully opened, and northern Myanmar was the only place for trade. Since the 2nd century BC, merchants have exchanged China's silk and gold along the Sichuan-Yunnan-Myanmar ancient road for Myanmar's precious stones, jadeites, kapok and other items.