What challenges that China face currently according to the video in the lesson？（）

What challenges that China face currently according to the video in the lesson？（）
A.integrated circuits
B.Export high speed rail system
C.Rely heavily on foreign tech such as operating systems and microchips（Huawei and ZTE）
D.Artificial intelligence and big data maturing
正确答案：integrated circuits#Export high speed rail system#Rely heavily on foreign tech such as operating systems and microchips（Huawei and ZTE）#Artificial intelligence and big data maturing