The BBC article is interesting:

With these executions Beijing is sending a message of deterrence to would-be scammers. But the business has now moved to Myanmar's border with Thailand, and to Cambodia and Laos, where China has much less influence.

Hundreds of thousands of people have been trafficked to run online scams in Myanmar and elsewhere in South East Asia, according to estimates by the UN. Among them are thousands of Chinese people, and their victims who they swindle billions of dollars from are mainly Chinese too.

Frustrated by the Myanmar military's refusal to stop the scam business, from which it was almost certainly profiting, Beijing tacitly backed an offensive by an ethnic insurgent alliance in Shan State in late 2023. The alliance captured significant territory from the military and overran Laukkaing, a key border town.

China exercising profound influence over their near abroad.

They are Ethnic Chinese who were operating scam centers in collaboration with junta at northern area Laukkai.

There are more at shwe Koko area.