I'm presuming that you are asking about the treasure ships of Zheng He. There are no archaeological finds supporting the first hand accounts of the size of the ships. Supposedly the ships were left to rot once the voyages were done. The first hand accounts of the voyages are quite interesting, especially the account of Ma Huan, a Muslim translator on the ships. Fei Xin also wrote an account, he was a soldier and journeyed to South East Asia and the Indian Ocean four times. The size of the ships is still being hotly debated.