The specific name of the cabin is consistent with that of the ship's chart room, which means the house where the compass is located. The command module is located on a merchant ship, usually in a shrine, also known as Notre Dame, where the goddess Mazu is worshipped and the discussion center on board. This naval vessel is called "Guanting", and its console is called "Jiang Tai". If we take the ship number as an example, such as Zheng He's fleet, the names of several big ships are: Wellcome, Qingyuan, Dafu and so on. During the Ming and Qing Dynasties, the names of merchant ships that went to Japan for Southeast Asian trade were generally marked at the stern, including Jin Quansheng, Lee Tae, Yongtai and Wansheng. In the Qing Dynasty, merchant ships in the offshore areas were generally marked with strings: a certain word, a certain number and a merchant ship in the south of the Yangtze River.