How can I extend my tourist visa in Samui and what documents do I need?

To extend your tourist visa in Samui, you can visit the local immigration office, which is located on Maenam Soi 1. The extension process involves filling out paperwork and providing a photo (which can be taken at the office), along with the address of your accommodation. The fee for extending the tourist visa is 1,900 THB. If you're considering switching to a business visa, it's usually recommended to return to China, but check for alternative solutions dependent on specific circumstances.