The 21 Infinite Sky Music Festival will be held in ditan park.

Ditan, also known as Fangzetan, is the second largest of the five altars in the ancient capital Beijing. Founded in the 9th year of Jiajing in the Ming Dynasty (AD 153), it is the place where emperors of the Ming and Qing Dynasties offered sacrifices to "the gods of the emperor", and it is also the largest existing altar of offering sacrifices to the gods in China. The total area of the altar is 37.4 hectares, and it is square. The whole building is designed in accordance with the traditional and symbolic legends of ancient China, such as "a place with a round sky", "a land with azure sky", "a land far away from the north", "a dragon and a phoenix" and "Gankun". There are ancient buildings in the Ditan, such as Fang Zetan, Imperial Palace, Sacrificial Pavilion, Zhai Palace and Shenku.

Bus route:

1. You can take bus No.14 and 18 from Beijing Railway Station and Chongwenmen to Ditan Station and enter the park from Xitianmen.

2. Take bus No.83 from Tiantan and Yongdingmen, get off at Yonghe Palace and enter the park from Nantianmen.

3. From the direction of the zoo and Xizhimen, you can take bus No.27 and get off at Andingmen Station, and enter the park from Xitianmen.

4. From Yuyuantan and Sanlihe, you can take bus No.13 and get off at Yonghegong Station, and enter the park from Nantianmen.

5. From Zhongguancun, you can take bus No.32 and 367 to the north exit of Heping Street, then take bus No.13 and bus No.62 to get off at Yonghegong Station and enter the park from Nantianmen.

6. Take the No.18 bus outside Dongzhimen, get off at Ditan Station and enter the park from Xitianmen.

7. From the direction of North Beach and Beiyuan, you can take bus No.328, 358 and 47, get off at Andingmen Station and enter the park from Xitianmen.

8. From the direction of Dabeiyao, Workers' Gymnasium and Agricultural Exhibition Hall, you can take bus No.113 and get off at Andingmen Terminal, then enter the park from Xitianmen.

9. All places along the subway can take the subway and get off at Yonghegong Station, and enter the park from Nantianmen.

1. From the direction of Kowloon Amusement Park and Aviation Museum, you can take bus No.912 and get off at Ditan Station, and enter the park from Xitianmen.

11. From the direction of longtan lake Amusement Park, you can take bus No.116 and No.87 and get off at Yonghegong Station, and enter the park from Nantianmen.