Log in to Alibaba Cloud console and click [Web Hosting].
Click [Manage] of an instance.
Choose [Environment Settings]>[Homepage file name to add]>[Enter the information about the index page to be set]>[Add]>[Save]
The top file has the highest priority. To delete information, click the information and click [X], and click [Save Settings].
NOTE: Only one PHP dynamic page (namely, xxx.php) can be set with priority for the index page, and the priorities of dynamic pages must be lower than those of static pages, as shown in the sequence in the preceding figure.