Many of these troublemakers were the people who took power because of their high scores on the imperial examination. The Yongle Emperor gave more power in his government to his eunuchs, men who had been hurt as children to stop them from being able to have children of their own. One of these men was Zheng He, an Islamic leader who led great treasure ships south from Suzhou and Nanjing in 7 big trips between 1405 and 1433. The first trips may have been looking for the Jianwen Emperor, but they also became trips that taught China about the South China Sea and Indian Ocean and opened up more buying and selling between their countries and China.