My web get 523 error from cloudflare

error information as below:
request url: 首頁-BUYUP官方集運
request method: GET
code: 523
cf ip: 104.26.3.94:80
other: strict-origin-when-cross-origin

my web server’s configuration as below:
1>server was at tencent cloud,2> web site used window+IIS 8.5

i don’t know why?but i tried to do below step to slove it,
1>used web server origin IP access same web,it work well ,these are not any error coming.
2>I upgrade bandwidth quota of web server,but still got 523
3>Changed A record to a business Cloudflare remote IP,but still got 523

if somebody have good ideas,please tell me,very thanks!

Please give it a read

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