After completing his formal education, he decided to attend the Whampoa Military Academy and graduated in the class of 1926.

After the Kuomintang was defeated in the Chinese Civil War, he relocated to Taiwan and later became the deputy commander of the NRA army group in charge of defending the Pescadores Islands.

On the night of August 8, 1944 he telegraphed the Chongqing National Government about the long resistance and his willingness to fight to the death for the sake of the country.

After running out of ammunition and supplies, and with no hope of getting reinforcement, he surrendered to the Japanese on the condition that all POWs would not be harmed and all wounded Chinese soldiers would get medical treatment.

The surviving Japanese veterans of the 11th Army, who personally participated in the battle of Hengyang, organized a group trip to Taipei to pay respect to Fang after his death in 1983.