Chang Dz Fang, his surname was Chang, his first name was Liang, and Dz Fang was his alias. He was born in the country of Han in the Chin dynasty. Five generations of his ancestors were all prime ministers in the country of Han.
When he was young, he was a chivalrous person which means he had the heart of bravery, generosity, and righteousness. He had a very unrestrained character. On his own, he studied the basic knowledge for both literary men and military generals, and he gained much from it.
After the Chin dynasty had entirely swallowed up six neighbouring countries, including the country of Han, Dz Fang schemed to assassinate the emperor of the Chin dynasty, in order to take revenge and to avenge the insult to the country. Unfortunately, he failed, and could only escape far away, wandering and making the world his home.
One time, when he was walking on the Chi bridge, he met an old man who deliberately threw his shoes over the railing. Seeing this, Dz Fang ran under the bridge, picked up the shoes and respectfully returned them to the old man. It turned out that the old man was an extremely well-known master in military strategy, whose name was Hwang Shr-gung. Master Hwang regarded Dz Fang as one who could be taught, and thereupon transmitted the skill of military strategy to Dz Fang.
After learning the skill of military strategy from Master Hwang, Dz Fang served under Lyou Bang (Emperor Gau of the Han), and became a famous strategist. He could be considered "wise and resourceful", as he had great wisdom and far-reaching stratagems. He was able to "prepare schemes in the tent, and decide who would be the victor over a thousand miles away." (Just by sitting in his tent and arranging the strategy, he could decide who would win and lose the battle fought than a thousand miles away.) The emperor of Han Lyou Bang had deep faith in him. He became one of the three heroes of that period. Shau He and Hen Syin were the other two heros.
Dz Fang assisted Emperor Han to destroy the countries of Chin and Chu, and helped the Han dynasty lay down a solid foundation in the world. Because Dz Fang had foresight, he decided to "retire after achieving success". He accomplished great merit for the country, and then retired. He was no longer confused by worldly wealth, honor, and splendour; carefree, he went to cultivate in the mountains, to "purify the mind and reduce his desires."
We could call him one of the great heroes of all time, one who knew the right time to do the right thing. There is a saying: a great man knows how to ride the tide of his times. This is also to say that If one could truly understand the direction of his times and the circumstance of the world, one will be able to choose the right path to walk.