Blessing of the Celestials. Donghua. Volume 4

Before you is the eponymous adaptation of the cult novel by Mo Xian Tongsu.

Escaping from a sandstorm, the heroes take refuge in a cave, where a trading caravan is already waiting out the bad weather. The cave turns out to be the tomb of a general who fought in these lands two centuries ago—around the same time when Xie Lian was collecting garbage in the vicinity...
The merchants believe that the road past Banyue is safe, as long as there is a good guide. But trouble comes from where it is least expected: travelers are attacked by snake-scorpions, one stings a merchant, and another stings the crown prince. The action of the poison can be stopped by the shan Yue grass, however, it can only be found outside the walls of the fallen city...