回复：回复：都说中国人好欺负, 我看这里的人都很牛啊

You have done enough -- 推开那个黑的冲出电梯， 然后回头大骂.

If you want sue them, it is very hard to build a case, also your physcial action (推开 and 大骂) may bring trouble to yourself.

You have done a good job. Let it go. Be careful of the confrontations with the 2 since now.