Does the frontier defense regiment belong to the armed police or the regular army?

The People's Liberation Army and our army (PLA, excluding the Armed Police) have a total of 2.3 million people, and are now divided into seven military regions: Beijing Military Region, shenyang military area command Military Region, Nanjing Military Region, jinan military area command Military Region, Guangzhou Military Region, Lanzhou Military Region and Chengdu Military Region. In addition, the Xinjiang Military Region and the Tibet Military Region are provincial military regions at the deputy corps level, while the Xinjiang Military Region (including the southern and northern Xinjiang military regions) has the largest number of field and border defense forces in the provincial military regions, with * * * four divisions, three independent regiments, an artillery brigade, an engineering corps and another 12 border defense regiment; Tibet Military Region has two mountain brigades, 1 Independent Regiment, 1 Engineering Regiment, 1 Artillery Regiment, 1 Anti-aircraft Artillery Regiment, 6 border defense regiments and 5 independent border defense battalions.