Which episode is Ji Xiaolan Nanzhi Store with Iron Teeth and Copper Teeth Burning?

Ji Xiaolan Shaonan Paper Shop is the fourth episode.

Emperor Qianlong personally examined Feng Deyun and learned the purpose of Feng Deyun's visit to Beijing. Gan Long asked Feng Deyun to plead guilty and make meritorious deeds, but Feng Deyun was assassinated on his way to the mansion. After learning about this, I want to talk to my father-in-law Cui. Unexpectedly, my father-in-law Cui was hanged. Gan Long decided to go to Nanzhi Store to look for evidence himself, but when he came to Nanzhi Store, it was already a sea of fire.

Qianlong was furious. The next morning, he asked Shun Tianfu about the fire in Yin Nan paper shop, and finally dismissed Shun Tianfu for dereliction of duty. Back to the south study, I summoned Ji Xiaolan and Xiao Shenyang again. I didn't expect that this time they had the same caliber and almost the same answer. Qianlong ordered them to find out the truth, and he quietly came to Huang's divination pavilion.

When I arrived at Guatan, I finally got a clue from Huangkou and met Zhu Xi in the street. Gan Long took the initiative to talk to Zhu Xi, saying that he was his eldest brother. Zhu Xi didn't want to give in, but Gan Long forced him to take him to Ge Beizi's house.