The Source of the Fuqing Herb

Royal Betrothal – Season 1

Luo points out that the "money herb" that has been cultivated by valley dwellers for generations is the fuqing herb and that merchants come to purchase it every month. Ying Gua decides to infiltrate first. He, Meng Tinghui, and Yin Qing disguise themselves as valley dwellers delivering the herb and conduct the transaction with the merchants.