There are several docks for the night tour of the Pearl River: Dashatou Cruise Terminal (with large ships and new facilities); Tianzi Wharf (with many boats and many grades); The docks of Xidi, Zhong Da and Fangcun are mainly ferry boats (cheap but not up to grade).
The professional companies of Pearl River Night Tour include Blue Dolphin Cruise Company, Guangzhou Star Cruise Company and Jin Hang Cruise Company.
The reference materials are very rich, so you can choose them slowly!