Blessing of the Celestials. Donghua. Volume 4

Before you is the titular adaptation of the cult novel by Moxian Tongsu.

Escaping from a sandstorm, the heroes take refuge in a cave, where a trade caravan is already waiting out the bad weather. The cave turns out to be... the tomb of a general who fought on these lands two centuries ago — roughly at the same time when Se Lian was collecting trash in the vicinity...
The merchants are convinced that the road past Banyue is safe, as long as there is a good guide. But misfortune comes from where it was least expected: snake-scorpions attack the travelers, one stings a merchant, and another — the hereditary prince. The action of the poison can be stopped by the shanyue herb, but it can only be found beyond the walls of the fallen city...