Wong was in the University seven years. After completing his professional studies as a doctor, he returned to China in 1857.
He was a fine scholar. He graduated the third man in his medical class. He also distinguished himself in his profession. His ability and skill secured for him an enviable reputation as one of the ablest surgeons east of the Cape of Good Hope at that time.
He had a fine practice in Canton, where the foreign residents retained him as their physician in preference to European doctors. He was very successful and made quite a fortune before his death, which took place in 1879.
Both the native and foreign communities felt his loss. He was highly respected and honored by Chinese and foreigners for his Christian character and the purity of his life.