First, for Judy, the first purpose of going out to sea is not to make money, but to publicize the national prestige, so that those countries that dare to hide his emperor can hand over people quickly, and those who know the whereabouts can tell them quickly, so as not to make Zhu I entangled and those who know nothing honest and obedient.

Second, yes, China is definitely a superpower. The products of other countries are basically unattractive to China, and the places where Zheng He went are basically underdeveloped areas. In many places, shells are still used for trade and no money can be made. Even spices, ivory, jewelry, jade and other valuables can be obtained through other trade methods, and the cost is not high.

Thirdly, Zheng He himself searched for Mecca by sailing. Finally, Zheng He also buried his bones in other countries, instead of trade first.

Fourth, Zheng He's fleet is too large, and the supply of such a large fleet is not a small expense. With the escort of the army and bureaucrats, it is difficult to make money. Portugal, the Netherlands, a boat 10 people to trade, the profit is higher than that of daming fleet.

Fifth, judging from the opposition of government cabinet officials recorded in Ming History, Zheng He not only lost money, but also lost a lot, so he wrote many times to demand the abolition of going to sea.