What are the requirements for me to study Buddhism in East Tianmu Mountain? Do you need to prepare anything for a long-term internship there? Where to practice for a day, to pay or to volunteer?

Just bring your ID card. Room and board are free, just bring your usual toiletries. If you don't have enough clothes, you can borrow them there. It got cold when I went there. There are many clothes sent by the outside world that can be borrowed. In the morning and evening classes, they follow the crowd, and in the rest of the time, they volunteer or learn Buddhism. Most of them choose to do some voluntary work, so they will eat and live for free and eliminate their karma for themselves. It is a good Dojo to cultivate pure land. You can't say anything but amitabha.