by the Chinese people is the little hero’s bravery.

这里的remembered不是做主语阿

主语在后面the little hero's bravery 小英雄的勇敢

只是句子倒过来说

正常语序是, The little hero's bravery is remembered by the Chinese people .

因为前面的主语比较长,所以放到最后去,避免造成头重脚轻的句子