After the uprising of October10,1911,(that has led )to the establishment of a Chinese republic,many Chinese Americans decided to return to China in hopes of a bright future (there).
为什么不能用has led to呢?
还有这里的there是副词就代表in China难道文中不用出现in china给它明确的吗?
(that has led )to the establishment of a Chinese republicthat引导的是非限制定语从句,虽然that很少用于这种情况,但却是是正确的。这个定语从句补充说明这次起义促进了中国的成立,但句子的核心在后面,指这次起义后,许多美籍华人为了光明的未来而决定回到中国。强调的是这次事件发生了以后,美籍华人有哪些举动,而不是强调事件的意义,可以把that引导的句子省略掉,仍然能表达原句所要表达的内容。there这里就代表的是in china,如果再写一个in china,显得重复,罗嗦。