Chapter 1637

Four nation-toppling beauties arrive: MQ, CY, Tang, and Liu.
Tang pulls a prank on Long Chen. She gives him 'milk' for him to drink, but it turned out it was vinegar. 
Liu Ruyan also gives Long Chen a barrel of stuff for him to drink. It was not milk. The cow Liu milked it from was a male. Liu originally had a larger barrel for him to drink, but gave him the smaller barrel after she found that Long Chen was not seduced by Shen Bijun.
Han Feifei also gives Di Xin some 'essence' for him to drink.