A child is attracted by an animal doll during a nature observation festival in Beijing, capital of China, Oct. 26, 2019. The nature observation festival kicked off in Beijing Haidian Park on Saturday. About 16 participating teams will choose observation sites in Beijing, and record species information of flora and fauna to provide data that could be used for biodiversity research and protection. The festival also consists of other activities aiming at improving residents' awareness of ecological protection.

Teams participating in a scientific activity pose for a photo at the opening ceremony of a nature observation festival in Beijing, capital of China, Oct. 26, 2019. The nature observation festival kicked off in Beijing Haidian Park on Saturday. About 16 participating teams will choose observation sites in Beijing, and record species information of flora and fauna to provide data that could be used for biodiversity research and protection. The festival also consists of other activities aiming at improving residents' awareness of ecological protection.

A child observes a leech through a magnifier during a nature observation festival in Beijing, capital of China, Oct. 26, 2019. The nature observation festival kicked off in Beijing Haidian Park on Saturday. About 16 participating teams will choose observation sites in Beijing, and record species information of flora and fauna to provide data that could be used for biodiversity research and protection. The festival also consists of other activities aiming at improving residents' awareness of ecological protection.

Children observe aquatic plants during a nature observation festival in Beijing, capital of China, Oct. 26, 2019. The nature observation festival kicked off in Beijing Haidian Park on Saturday. About 16 participating teams will choose observation sites in Beijing, and record species information of flora and fauna to provide data that could be used for biodiversity research and protection. The festival also consists of other activities aiming at improving residents' awareness of ecological protection.

A staff member from Shanshui Conservation Center tutors a child during a nature observation festival in Beijing, capital of China, Oct. 26, 2019. The nature observation festival kicked off in Beijing Haidian Park on Saturday. About 16 participating teams will choose observation sites in Beijing, and record species information of flora and fauna to provide data that could be used for biodiversity research and protection. The festival also consists of other activities aiming at improving residents' awareness of ecological protection.

A child observes aquatic plants during a nature observation festival in Beijing, capital of China, Oct. 26, 2019. The nature observation festival kicked off in Beijing Haidian Park on Saturday. About 16 participating teams will choose observation sites in Beijing, and record species information of flora and fauna to provide data that could be used for biodiversity research and protection. The festival also consists of other activities aiming at improving residents' awareness of ecological protection. (Photos: Xinhua/Tao Xiyi)

A child observes aquatic plants under the instruction of a staff member during a nature observation festival in Beijing, capital of China, Oct. 26, 2019. The nature observation festival kicked off in Beijing Haidian Park on Saturday. About 16 participating teams will choose observation sites in Beijing, and record species information of flora and fauna to provide data that could be used for biodiversity research and protection. The festival also consists of other activities aiming at improving residents' awareness of ecological protection.

Children learn the knowledge of aquatic plants during a nature observation festival in Beijing, capital of China, Oct. 26, 2019. The nature observation festival kicked off in Beijing Haidian Park on Saturday. About 16 participating teams will choose observation sites in Beijing, and record species information of flora and fauna to provide data that could be used for biodiversity research and protection. The festival also consists of other activities aiming at improving residents' awareness of ecological protection.