The Suey Sing Tong was a Chinese-American low-level criminal organization that was active in 1870s San Francisco. Led by Lao Tze, the Suey Sing secretly became involved in opium trafficking on Long Zii Tong turf in 1878, leading to Mai Ling sending Zing Yuen and his Fung Hai Tong to massacre the Suey Sing at their gambling den.