Kou Mi Fu Jian (Honey in the Mouth and Swords in the Stomach)
Li Linfu was a prime minister of China during the Tang dynasty 618—907AD). He was good at both calligraphy and painting, but had a crafty and sinister personality which made him disliked by everyone. Li Linfu would bribe the palace eunuchs and concubines to tell him what the emperor liked, and then would immediately go prepare that thing for the emperor. The emperor was therefore very fond of Li Linfu, and trusted him unduly.
One time, the minister Li Shizi offended Li Linfu. Li Linfu pretended not to care, and was in fact especially nice to the minister. Then on e day, he told Li Shizi about some gold that was hidden over in Hua Mountain, and encouraged him to suggest mining this gold to the emperor. Li Shizi being of an honest and upright disposition, believed that it was true, and immediately went and told the emperor. But when the emperor began to discuss this with Li Linfu, Li Linfu acted very frightened and said,
"Hua Mountain in the place where all of Your Majesty's auspicious aurora are gathered. If we were to mine that area, it could be very dangerous for you. Who is it that wants to harm you?
Today we can describe someone who is two-faced-who is always nice on the outside and yet is mean to people behind their backs-as having "Honey in the Mouth and Swords in the Stomach."