How many homing pigeons are there in one kilometer in China?

Pigeons from Shen 'an Pigeon Industry, Yu Hai Pigeon Industry, Zhuang Yun, Huang Caochang, Zhao Xianyao and Yu Yuguang.

Langfang Station, a classic event in China, is the 20th national autumn long-distance race in 2020. 10/65438 opened at 7: 00 on October 20th, with longitude1/6 degrees 48 minutes and 38 seconds, latitude 39 degrees 29 minutes and 33 seconds, and * * counted 8225 feathers. Zhejiang 122, Anhui 3245 (including 563 in Hefei, 2049 in Bengbu and 633 in other cities).

Langfang Station, a classic event in China, is the 20th national autumn long-distance race in 2020. 10/65438 opened at 7: 00 on October 20th, with longitude1/6 degrees 48 minutes and 38 seconds, latitude 39 degrees 29 minutes and 33 seconds, and * * counted 8225 feathers. Zhejiang 122, Anhui 3245 (including 563 in Hefei, 2049 in Bengbu and 633 in other cities).

On the evening of 20th, at 22:0 1:3 1, the first homing pigeon was welcomed in Shanghai, which was a racing pigeon from Zhao Zhiyong. The speed was 1902 1803, and the clearance was1578.38m/min. After one and a half hours,