Three articles (out of many) that provide a few insights in China’s relations with Central Asia: foreign policy, trade, and the policy towards its own Central Asian Uyghur population:
https://www.theworldofchinese.com/2015/03/the-silk-road-endures-driver-zhou/:China’s exports to Central Asia revive the Silk Road, but Chinese communities in Central Asia are not always integrating easily.
https://www.scmp.com/news/china/diplomacy-defence/article/2125879/china-ready-work-afghanistan-counter-terror-threat: The One Belt, One Road Initiative (OBOR/ BRI, 一帶一路) builds infrastructure to increase trade across the Eurasian continent, and increasingly includes Africa. But issues of national security are of course also a concern.
https://www.nytimes.com/2018/09/08/world/asia/china-uighur-muslim-detention-camp.html#click=https://t.co/HFbWW9GKMJ China watchers have for over a year now seen an increase in the severity of the treatment of Uyghur muslims in Xinjiang, and the story finally made it to the front page of the Sunday NYT two weeks ago. Mass incarceration is of course not unique to China, or to communism, but the international community of scholars has been watching this development with alarm.