A very good, timely reminder.
With Pakistan now being bought by Washington after the ousting of Imran Khan, there is never the chance to be "too careful" with regards to China's Xinjiang region, and her Central Asian neighbours to the west in general. Coupled with Kazakhstan's failed coup attempt early this year plus the attempted approachement of the US into the Central Asian countries, China's position and security around her and on the world stage are getting more challenging than ever.
That means China must be able to properly safeguard her BRI projects not just in Central Asia, but also across the rest of the world, in terms of both tactical (i.e. deploying armed personnel to guard those BRI facilities against terrorists and saboteurs) and strategical (i.e. winning more hearts and minds of the developing world and decisively sway them away from the US - that is, even with open, direct threats from DC).
Furthermore, right now, there are two options for China - Either China manage to secure her western borders and made them into an impenetratable fortress wall, or China gets surrounded by her enemies from (virtually) all sides.
That would mean either China will survive and truimph further into the 21st century, or repeat the Century of Humiliation with even more disasterous results awaiting her 1.4 billion populace.
Beijing must be diligent and steadfast in her actions.