So you were asking how to say "lol" in Chinese? When used in Internet chat rooms. We only use "haha" or "哈哈" in Chinese or 哇哈哈哈哈哈！！！= looooooool You can also use "笑死我了" somewhat like "Lmao" or "太搞笑了" literally means "It's so funny".

mort de rire 应该是"笑死了"吧...难道 rire 还有"吓"的意思?