阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入适当的词或用括号中词语的正确形式填空。

Yuan Longping was a great scientist. He spent his life (help) lift our nation out of hunger by planting his hybrid rice. Now people plant it in countries such as India, Vietnam and the US. (million) of people around the world benefit from his rice. People call (he) the "father of hybrid rice". However， May 22nd, 2021, he passed away at 91. It was (real) a sad day for all the people across China.