In researching Zheng He and the background to his voyages, I have to be extremely clear on the subject of where he traveled to. Various sources provide a detailed record regarding Zheng's expeditions to East Africa.
我研究鄭和，對於整個下西洋的背景過程，當然必須十分清楚鄭和到過那些地方，是否遠及東非，在《明史》、《明實錄》、《星槎勝覽》… … 及其他西文資料中都有詳盡記載。