Final answer:
China began spending its resources on other projects like the Grand Canal and Forbidden City instead of treasure ships. They also allowed European merchant ships and Spanish galleons to trade with China.
Step-by-step explanation:
China began spending its resources on other projects instead of treasure ships, such as the extension of the Grand Canal to Beijing and the construction of the Forbidden City. Additionally, the Ming dynasty reversed its policy on foreign trade in 1567, allowing European merchant ships to arrive in China. The arrival of Spanish galleons from Manila, carrying silver from the Americas, also caught the interest of the Chinese.