Wei Zheng. If you use a wise person, all the wise people will come together; if you use a small person, all the bad people will flock together. This means that if you use a wise person, the wise people in the world will flock to do their best for the country. On the contrary, if you use a small person, then all the bad people will come to seek help. Li was what Wei Zheng said when he advised Tang Taizong to appoint virtuous people. Tang Taizong thought what he said was quite reasonable. Wei Zheng (580-643), also known as Wei Zheng and Wei Zhenggong, also named Xuancheng, was a native of Quyang County, Julu County. He was the prime minister of the Tang Dynasty, an outstanding politician, thinker, writer and historian.