请帮我修改下列文字中的词语与语法错误.

题目

请帮我修改下列文字中的词语与语法错误.
China our homeland,in the large land have a lot of poor man ,a lot of pain man ,we must work hard!we must make they
be rich and happy .
I love the people, my livelihood all is the people give me,we must work hard in my lift time the people .and make more people chang rich and happy.

答案

China,our homeland,within its large territory there are a lot of poor and pain men,so we must work hard!We must make them to be rich and happy.
I love the people,and my whole livelihood is given by them.So I must work hard during my life time for the people and make more of them to becoem rich and happy.