In the center of the cover appears the symbol of the 2010 Asian Games held in Guangzhou, it is possible that the name Haixinsha appearing in the text refers to the main stadium: Haixinsha Square
The cap may be marketed/manufactured by Jixin Metal Products, representing Hydrotec
The lid is similar to other manhole covers made by the same manufacturer, for example
Translation of the text on the cover: 广州海心沙 Guangzhou Haixinsha 雨水 - Rainwater