Photo taken on Nov. 1, 2018 shows a golden monkey at Yuhe National Natural Reserve in Yuhe Town of Longnan City, northwest China's Gansu Province. Golden monkeys are under China's top-level protection. (Xinhua/Fan Peishen)

Photo taken on Nov. 1, 2018 shows a golden monkey at Yuhe National Natural Reserve in Yuhe Town of Longnan City, northwest China's Gansu Province. Golden monkeys are under China's top-level protection. (Xinhua/Fan Peishen)

Photo taken on Nov. 1, 2018 shows a golden monkey at Yuhe National Natural Reserve in Yuhe Town of Longnan City, northwest China's Gansu Province. Golden monkeys are under China's top-level protection. (Xinhua/Fan Peishen)

Photo taken on Nov. 1, 2018 shows golden monkeys at Yuhe National Natural Reserve in Yuhe Town of Longnan City, northwest China's Gansu Province. Golden monkeys are under China's top-level protection. (Xinhua/Fan Peishen)

Photo taken on Nov. 1, 2018 shows golden monkeys at Yuhe National Natural Reserve in Yuhe Town of Longnan City, northwest China's Gansu Province. Golden monkeys are under China's top-level protection. (Xinhua/Fan Peishen)

Photo taken on Nov. 1, 2018 shows golden monkeys at Yuhe National Natural Reserve in Yuhe Town of Longnan City, northwest China's Gansu Province. Golden monkeys are under China's top-level protection. (Xinhua/Fan Peishen)

Photo taken on Nov. 1, 2018 shows golden monkeys at Yuhe National Natural Reserve in Yuhe Town of Longnan City, northwest China's Gansu Province. Golden monkeys are under China's top-level protection. (Xinhua/Fan Peishen)

Photo taken on Nov. 1, 2018 shows golden monkeys at Yuhe National Natural Reserve in Yuhe Town of Longnan City, northwest China's Gansu Province. Golden monkeys are under China's top-level protection. (Xinhua/Fan Peishen)