Why did China refuse to host the Olympics three times?

Video with English subtitles: Why did China refuse to host the Olympics three times? In one sentence: "Cultural colonization," "Western hegemony," "double standards," "insulting non-white host countries," etc. China will not serve! 視頻有英文字幕: 奥运，中国为什么三次拒绝再主辨奧運！一句话：“文化殖民”“西方霸權”“雙重標準”“侮辱非白人東道國” 等等，中國不伺候了!