router WPA AES密碼

None... unless you saved the file somewhere in your PC while setting up your router in the very first time.

However, you can login to your router to change the WPA password by accessing default gateway http://192.168.1.1 (refer to your manual for the correct IP address). If you dont have the manual anymore, on command prompt, type ipconfig and it will show you what gateway IP address is. (C:\ipconfig)

Router username: admin (99% of the time)
Router password: 99% is empty (do not type anything) or password.

Note: If you created a password for your router and forget what it is, reset the router at the back and it will be restored back to manufacturer default setting.

Hope this help