I want to travel to Angkor Wat in Cambodia and travel freely. What formalities do I need to go through? I hope it can be more detailed. Thank you.

There are embassies in Beijing, Shanghai and Guangzhou. I have one in Beijing, 190 yuan/person. Just fill out a form, pay your passport and 1 two-inch photo (photos are not required within six months). There is no need to use a copier. So far, no visa has been refused. If you handle it normally, you will leave the day after tomorrow, that is, on Monday and Wednesday. There is no need to worry or find a travel agency to handle it. They usually accept 400 yuan/people. It's too dark. You can buy a plane ticket first. You can take a bus from Phnom Penh to Angkor Wat or fly directly to Siem Reap. However, it is the rainy season, and it seems that only Guangzhou has a plane to Siem Reap. Both Beijing and Shanghai have direct flights to Phnom Penh. Beijing is China Southern Airlines and Shanghai is Shanghai Airlines. I booked a plane of China Southern Airlines. Booking tickets on China Southern Airlines website is cheaper than Ctrip or finding a travel agency. Of course, if you can get a group ticket, that's another matter.

You can go to Ctrip community to see the introduction. Many people recommend local accommodation and car owners in Tu Tu. There are many people who know Chinese, so it's no problem to travel freely. If you are really worried, you can choose Ctrip to travel freely, and the air tickets and hotels have been booked for you.