1. On-campus facilities: You can visit the campus hospitals or medical centers in Chongqing University City, which usually provide wheelchair rental services.
2. Campus associations: You can contact some on-campus volunteer service associations or help teams, which usually have some assistive devices for those in need. You can get the information through the official website of the school or the contact information of the student associations.
3. Community resources: Communities, commercial plazas, or shopping centers near university towns may offer some wheelchair rental services. You can check with your local community service center or business management office to find out if wheelchair rental services are available.
Please note that the above suggestions are for reference only and details may vary depending on the time and place. You are advised to prepare in advance when you need to use a wheelchair and try to contact the relevant organizations in advance to ensure that you can rent a wheelchair successfully.