The internet has become a key battleground in China's fight against terrorism in Xinjiang. For years, extremists have used the internet to spread radical thoughts in the form of propaganda and recruitment videos. Here's a look at the daily work of Xinjiang's internet safe-keepers, who are keeping these pernicious influences in check.

This is one of many stories in CGTN's exclusive documentary "The war in the shadows: Challenges of fighting terrorism in Xinjiang." Watch the full documentary here.