明人刘伯温写过一则寓言，读来令人深思。说的是越国有个叫虞孚的人，他种漆树得了数百斛漆，准备到吴国去卖。走前他把漆树叶子也煮出汁来，一同带到了吴国。吴国有位商人看到虞孚的漆成色十分纯正，准备全部买下，约定次日提货。虞孚见买卖成交，心中暗喜，为了多赚钱，他连 Ming Liu Weibin wrote a fable, read thought-provoking. Said that the more people have a country called Yu Fu, he kind of paint tree got a few hundred Houchu paint, ready to Wu to sell. Before leaving he also made the leaves of paint tree juice, together with the Wu. Wu Guo a businessman saw Yufu paint quality is very pure, ready to buy all, agreed to pick up the next day. Yu Fu see the transaction, the heart of dark, in order to make more money, he even