Dns cant set ,website moved,china mainland

At first,I want to speed my website in china mainland,so I registered su.baidu.com and used cname method to use cdn provided by su.baidu.com,but when I set cname record in cloudflare,error occured,then I delete cdn setting in baidu,my website still cant access,and cf told me my website was removed…How can I use back to cf ,when I click recheck,still not working .