Sai Wing Mock
| Sai Wing Mock (麦世荣)  "Mock Duck" (麥德) | |
|---|---|
| Early New York City Police Department mugshot of Chinese criminal Tong leader Mock Duck, before going to Sing Sing Penetentiary, 1912 | |
| Born | 1879 Guangdong, China | 
| Died | July 23, 1941 (age 62) Chinatown, Manhattan, New York City, United States | 
| Nationality | Chinese American | 
| Occupation(s) | thief, river pirate, kidnapper, criminal gang leader | 
| Known for | Being top New York City Chinese Tong gang leader from late 19th-mid 20th century | 
Sai Wing Mock (aka Mock Duck) (1879 – July 23, 1941) was a Chinese-American criminal and leader of the Hip Sing Tong, which replaced the On Leong Tong as the dominant Chinese-American Tong in Manhattan Chinatown in the early 1900s.