The antecedents to the Singapore Ang Chee Sia Ong Temple go back 2000 years to China.
Wang Kang was a high-ranking official of the kingdom of Shu Han - one of the three kingdoms in Chinese history. Being an upright and honest official, he was deeply respected by the people. He was given the title of An Ji Shen Wang (Ang Chee Sia Ong) after his death and a temple was built to honour him. Green snakes were often spotted at the temple and when the people of Chao Shan saw one at the battlefield, they would invariably emerge victorious. They believed that the green snake was the transformation of Ang Chee Sia Ong, whose spirit provided a protection of them against disasters. Hence Ang Chee Sia Ong was also known as Sacred Lord Green Dragon (Qing Long Shen Wang) and the temple, Qing Long Gu Miao.
The Singapore temple was built in 1920s, when Mr Wang Dong Qing brought the deity from Chaozhou Guangdong Province to Singapore on a migration. In the beginning the temple was located at Tao Yuan village and villagers there prayed once a year on the fifth day of the fifth month on the lunar calendar, which was the birthday of Lord Qing Long.
Due to Singapore's being ever hungry for more land, the area around the temple was subject to land reclamation. Hence, the temple was moved to the current location in 1990's.