Tip: when attempting to convince someone they've been brainwashed into "anti-China" views, be fucking smart about it and take several things into account:

My government has an interest in kissing China's ass for economic reasons. We haven't raised a Humanitarian hell about Tibet just for this fact--though, it couldn't outright condone it without annoying its own residents--so show a little fucking gratitude, why don't you. /sarcasm

Two: when "proving anything," it's a safe bet that you ought to never look for information from the occupying country. This is a given Law of What Not to Do in a Discussion About Occupation. This is because the occupying country has a vested interest in making their ass look good.

Three: China bullshits its history to make itself look good or validate whatever policy they're pursuing at the moment. This is a typical pattern in many countries, but in China it is quite pronounced and common (in America, we have the convenient omission of American eugenics until you get into college, then it's not a sure bet, but in China they shoved a foot in the door everywhere and then claimed sovereignty or something). It's like reading the Bible and looking for alien abductions (thank you, History Channel). Further subnote: have you not noticed a pattern? Country A has a horrible repressive backward government and China comes in and liberates them. No, actually it was Country A was generally minding its own business and China came up with a marketable reason and method to gain more territory and hegemony.

Four: just because I don't agree with you doesn't mean I'm "anti-China." I don't agree with Zionism either, but so help me God: I'm not anti-Semitic. I don't hate the Chinese, I don't hate Jews. I just...respectfully disagree (not that the two situations are comparable; it's only the similar conclusions reached that are under question).