On September 17, the day before the 88th anniversary of the "September 18 Incident", which marks the start of Japan's invasion of China, several patriotic Hong Kong residents spontaneously organized a clean-up team after rioters vandalized the Wu Kau Tang Obelisk , which is the only national-level monument to commemorate heroes who died in their resistance against Japanese invasion in Hong Kong. 

(Executive Editor: Ke Ye)