Maybe the mirror site you are using has not been updated. Now the dl.google.com and dl-ssl.google.com domain names have servers in mainland China, so there is no need to circumvent the firewall. If your default resolution is still abroad, you can use ping.chinaz.com to ping the available IP and change it. Local hosts resolved.
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
Maybe the mirror site you are using has not been updated. Now the dl.google.com and dl-ssl.google.com domain names have servers in mainland China, so there is no need to circumvent the firewall. If your default resolution is still abroad, you can use ping.chinaz.com to ping the available IP and change it. Local hosts resolved.
First go over the wall and download a new version of sdk manager
There is no need to circumvent the wall. There is a Chinese website in China. I will give you the address directly: http://sdk.android-studio.org/
The reason is that the mirror used has not been updated. After turning off the mirror, 24 appeared as expected