What is the cheapest travel budget for a person from Suzhou to Beijing? I want to visit places like Tiananmen, the Great Wall, and the Bird's Nest. I plan to stay in Beijing for 3 days.

Three days are enough time to visit the major attractions. It is recommended that you take a sleeper train to Beijing so that you can go out and play as soon as you get off the train. It is best to book an international youth hostel in advance (charged by bed, 45 yuan) There are only backpackers living there, so it is very safe. I have stayed at Yonghe Youth Hostel). After getting off the train, go directly to the hotel, place your luggage, and go straight to the attractions.

Transportation is mainly based on the subway. Except for the Great Wall, all other major attractions are accessible by subway, and the whole trip costs 2 yuan.

Go to the Forbidden City Tiananmen on the first day. If you walk around Tiananmen carefully, it will take 4-6 hours. The full ticket for the Forbidden City seems to be 60. After visiting Tiananmen, you can go to the Lama Temple or the Imperial College. After you finish shopping, you can go to Yonghe Temple. Eat snacks at the palace. Shichahai’s snacks are also famous, but southerners may not be used to them. It's best to search the route online in advance, otherwise it will be a long detour.

To go to the Great Wall, you can take a bus from behind the Deshengmen Tower (go early in the morning, otherwise there will be a traffic jam). The fare is 12 yuan and goes directly to the Badaling Great Wall. There is a guide on the bus (don’t take the wrong bus, if If you take the wrong train, you may end up at other small Great Walls instead of Badaling.) The ticket price for Badaling seems to be 50, and it will take 6 hours to climb the entire Great Wall.

Going to the Bird's Nest and Water Cube at night is really not interesting during the day.

You can calculate the cost yourself. It will be hard to say if you have two big meals or buy a few souvenirs.