《明史·列传·卷二百零八》
皇帝都把他们遣送回去了。皇帝对中书省的大臣们说 ：高丽给朝廷的献贡太频繁，既增加了他们百姓的负担，又有过海时翻船溺水的危险。
谓中书省臣曰： 高丽贡献繁数，既困敝其民，而涉海复虞覆溺。
The emperor sent all of them back. The emperor said the prime minister in the Secretariat Province: The Goryeo's tributes to the court were too frequent, not only increased the burden of their people, but also there was the risk of capsizing and drowning when crossing the sea.
<s>[INST] Kindly elucidate the central themes in this passage in English: 谓中书省臣曰： 高丽贡献繁数，既困敝其民，而涉海复虞覆溺。 [/INST] The emperor sent all of them back. The emperor said the prime minister in the Secretariat Province: The Goryeo's tributes to the court were too frequent, not only increased the burden of their people, but also there was the risk of capsizing and drowning when crossing the sea.</s>
Kindly elucidate the central themes in this passage in English: 谓中书省臣曰： 高丽贡献繁数，既困敝其民，而涉海复虞覆溺。
user
The emperor sent all of them back. The emperor said the prime minister in the Secretariat Province: The Goryeo's tributes to the court were too frequent, not only increased the burden of their people, but also there was the risk of capsizing and drowning when crossing the sea.
assistant