The Sikh Temple in Wanchai signifies the colonial past of Hong Kong. When Hong Kong was colonised by the British in 1841, the British administration brought along with them a group of fine Indian Sikh men who served as the earliest policemen in Hong Kong.
The locals call the Sikh policemen 大頭綠衣 (literally "Big Head Green Clothes"), as they all wear turbans on their head with the standard green Hong Kong policeman uniform.
As of today, Hong Kong has a significant Indian (Sikh) community of about 7,500, mostly originate from the Punjab region in India and Pakistan.
(Note: The cache is located outside the temple.)