After finishing business negotiations.
With a few drinks and not having seen each other in a while, Li Jianguo opened up about the origins of the dishes on the table. Some were traditionally learned from books while others were derived from 'inspecting' offerings at other restaurants. Himself a master chef, a few bites were all he needed to discern the ingredients and even the order in which they were combined. With a bit of home practice, his imitation would be very close to the original dish.
After endless tweakings, Li Jianguo managed to stabilize the flavour. All Tang Qing, the taster, could do was give him the thumbs up as the taste was truly amazing.