By 1937, the school was well established. However the Sino-Japanese War that began that year had several effects on the school. In the Mukden Incident, before the war formally began, the Japanese repeatedly breached the Chinese border. Pui Ching students created a campaign called "The Anti-Japanese National Salvation", and organized propaganda teams to encourage patriotism. After the Marco Polo Bridge Incident in July 1937, Pui Ching moved its site to Heshan. In January 1938, the school moved from Guangzhou to Macau.