Cumsingmoon or Jinxingmen (Chinese: 金星门港) is an anchorage in Zhuhai, Guangdong, on the southern coast of China, within the Pearl River estuary and close to the former European colonies of Macao and Hong Kong. In the early years of British Hong Kong in the 1840s, Cumsingmoon, together with Nan'ao, was home to an informal "counter-colony" jointly managed by opium merchants and local Chinese officials, helping traders to evade the colonial administration. In 1845, this settlement comprised a self-governing community of 5,000 Chinese and European traders.