YUK devises to put a lot of salt inside the water so that the coins with gold would sink while pure metal coins would float on top. SUN thinks of way to spoil YUK`s plan. He asks JIAN to pour a huge volume of vinegar around the well. If it rains, the vinegar would absorb and no matter there is gold or not, all coins would sink. It really rains heavily on the day YUK tried to demonstrate. YUK is shocked. The deadline of casting the coin money is due soon. HUNG arranges to meet SUN in the Kwun-Yin Temple. SUN requires HUNG to give him five hundred taels and the hand of the jade Kwun-YIN as an exchange for telling him the trick.