Are you talking about circumventing China's censorship or what?
Both circumventing china's censorship and all cloud storage file detection technique
--------------------- MERGED ---------------------------
Since 翻墙 (VPN tools) in china isn't hard and high level hacker can just circumvent any file type detection in any ways
All cloud storage in china will block all illegal files and say it "根据相关法律法规政策,该文件禁止下载或者分享" "According to the relevant laws and regulations, this document prohibited for download or share"
But encrpyt it in anyways before upload them make the censors difficult to block the file easily the normal way
This file circumvention technique works just fine for all cloud storage services such as google drive ,mega ,microsoft onedrive and so on
--------------------- MERGED ---------------------------
The "微云网盘" weiyun cloud storage in this video have blocked my account for "sharing illegal file on our service"
Then i stop all kind of file sharing activity and just encrypt absolutly everything for this 微云网盘 weiyun cloud storage
I have 10T of storage on this service for 10RMB for each month , tencent have cancelled the 10T large storage for normal unpaid users for some reason such as 扫黄打非 anti-pornography in china (some people upload this kind of files and sharing them for money)"传播淫秽物品牟利罪"
"crime of spreading pornographic articles for profit"