Answer :

The main effect of ming leaders banning ships with more than two masts was that there was no further construction of ships masts, because there was a surplus. 
melisarevilla

Hi!

As you may know, the Ming emperor stopped the production of ships back in 1435, which was also the year of Zheng He’s death.

Because ships were no longer being produced, China’s explorations halted and Chinese population lost its need to explore other cultures. This ended up resulting in the Chinese empire being weakened and stunned in growth

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