On 1 January 1850 Fast arrived in Foochow (today Fuzhou) as the missionary from the LutheranLund Missionary Society of Sweden,[3] and was joined by Anders Elgqvist [sv] later that year. The mission they set up in China was short-lived. On 13 November 1850 the two missionaries were brutally assaulted by Chinese pirates when they were coming up the River Min after getting money from a ship. Armed with a pistol Elgqvist survived the attack, but Fast was killed on the spot.[4]
Fast was buried in Fuzhou Nantai.[2] An order was given by then-Fujian Governor Xu Jiyu (徐继畬) to capture the murderers within three days, and the case was finally settled on 18 November, with three criminals brought to justice.[5]