With nothing lasting forever in mind, you should all stop grumbling, enjoy China, while it lasts...wo shi dui de hai shi wo shi dui de?

Don't complain about others if they disagree with you as "grumbling", it is lame and immature. It shows that you don't actually have anything valuable to say. I do not call you a whiner, complainer, or grumbler based on what you have written although the thought has crossed my mind, but I don't need to take such shortcuts. If you can't take another person's opinions well because you can't provide solid, real information to back up what you are saying then that is your own [edited] mind acting up. You don't have the facts to back up what you are saying, and it is you who needs to re-examine your statements. You can always say that you agree to disagree, it's easy enough. Try and show a little class if you really want to convince readers that you mean well and that they should take you more seriously.