Myanmar is not China. Why does it speak Chinese and look like China people?

First of all, Myanmar is an independent country. Historically, it did exist as a vassal state of the Central Plains Dynasty. In modern times, due to wars and commercial exchanges, many former China people moved to or stayed in Indochina countries, among which the former Kuomintang troops who retreated to Indochina during the War of Liberation were more representative. Although some of them returned to their hometown or retreated to Taiwan Province province, some of them stayed in the local area.

As for the similarity in appearance, the people in East Asia and Southeast Asia are actually not very different in appearance, belonging to similar races, but the acquired differences caused by the differences in food and living environment and religious culture in various regions.

Above.

Personal advice, for reference only, good luck.