改好的：
I’m a Chinese,I love China than any other country,because I love my motherland,so I must work hard to learn foreign culture to make our country stronger.
I’m a Chinese,I love China than others 【others后面不能再加名词了】 country,because I love my motherland,so I must hard-work 【must是情态动词,后面应该加动词原形,而hard-work不是动词原形】to learn others【同第一点】 culture then【这里缺主语】 let our country become more strong 【stronger的比较级是stronger】