The Guangdong-Hong Kong strike was a strike and boycott in that took place between Hong Kong and Guangdong, China from June 1925 to October 1926. It started out as a response to the May Thirtieth Movement shooting incidents in which Chinese protesters were massacred by the British. The strike committee organized pickets to patrol the Pearl River area as shown in this picture. [Photo/Exhibition Road to Rejuvenation at the National Museum of China]

This site of the base of the Guangdong-Hong Kong strike committee. [Photo/gzzxws.gov.cn]