Nov. 5, 2018 -- A man works at the construction site of Keku Bridge in Aba Tibetan and Qiang Autonomous Prefecture, southwest China`s Sichuan Province, Nov. 3, 2018. The closure of Keku Bridge, a key project of Wenchuan-Ma`erkang expressway, was finished on Saturday. (Xinhua/Liu Kun)

Nov. 5, 2018 -- Aerial photo taken on Nov. 3, 2018 shows the construction site of Keku Bridge in Aba Tibetan and Qiang Autonomous Prefecture, southwest China`s Sichuan Province. The closure of Keku Bridge, a key project of Wenchuan-Ma`erkang expressway, was finished on Saturday. (Xinhua/Liu Kun)

Nov. 5, 2018 -- Aerial photo taken on Nov. 3, 2018 shows the construction site of Keku Bridge in Aba Tibetan and Qiang Autonomous Prefecture, southwest China`s Sichuan Province. The closure of Keku Bridge, a key project of Wenchuan-Ma`erkang expressway, was finished on Saturday. (Xinhua/Liu Kun)

Nov. 5, 2018 -- Aerial photo taken on Nov. 3, 2018 shows the construction site of Keku Bridge in Aba Tibetan and Qiang Autonomous Prefecture, southwest China`s Sichuan Province. The closure of Keku Bridge, a key project of Wenchuan-Ma`erkang expressway, was finished on Saturday. (Xinhua/Liu Kun)

Nov. 5, 2018 -- Aerial photo taken on Nov. 3, 2018 shows the construction site of Keku Bridge in Aba Tibetan and Qiang Autonomous Prefecture, southwest China`s Sichuan Province. The closure of Keku Bridge, a key project of Wenchuan-Ma`erkang expressway, was finished on Saturday. (Xinhua/Liu Kun)

Nov. 5, 2018 -- Aerial photo taken on Nov. 3, 2018 shows the construction site of Keku Bridge in Aba Tibetan and Qiang Autonomous Prefecture, southwest China`s Sichuan Province. The closure of Keku Bridge, a key project of Wenchuan-Ma`erkang expressway, was finished on Saturday. (Xinhua/Liu Kun)

Nov. 5, 2018 -- People work at the construction site of Keku Bridge in Aba Tibetan and Qiang Autonomous Prefecture, southwest China`s Sichuan Province, Nov. 3, 2018. The closure of Keku Bridge, a key project of Wenchuan-Ma`erkang expressway, was finished on Saturday. (Xinhua/Liu Kun)

Nov. 5, 2018 -- People work at the construction site of Keku Bridge in Aba Tibetan and Qiang Autonomous Prefecture, southwest China`s Sichuan Province, Nov. 3, 2018. The closure of Keku Bridge, a key project of Wenchuan-Ma`erkang expressway, was finished on Saturday. (Xinhua/Liu Kun)

Nov. 5, 2018 -- Aerial photo taken on Nov. 3, 2018 shows the construction site of Keku Bridge in Aba Tibetan and Qiang Autonomous Prefecture, southwest China`s Sichuan Province. The closure of Keku Bridge, a key project of Wenchuan-Ma`erkang expressway, was finished on Saturday. (Xinhua/Liu Kun)

Nov. 5, 2018 -- Photo taken on Nov. 3, 2018 shows the construction site of Keku Bridge in Aba Tibetan and Qiang Autonomous Prefecture, southwest China`s Sichuan Province. The closure of Keku Bridge, a key project of Wenchuan-Ma`erkang expressway, was finished on Saturday. (Xinhua/Liu Kun)

Nov. 5, 2018 -- Aerial photo taken on Nov. 3, 2018 shows the construction site of Keku Bridge in Aba Tibetan and Qiang Autonomous Prefecture, southwest China`s Sichuan Province. The closure of Keku Bridge, a key project of Wenchuan-Ma`erkang expressway, was finished on Saturday. (Xinhua/Liu Kun)

Nov. 5, 2018 -- Photo taken on Nov. 3, 2018 shows the construction site of Keku Bridge in Aba Tibetan and Qiang Autonomous Prefecture, southwest China`s Sichuan Province. The closure of Keku Bridge, a key project of Wenchuan-Ma`erkang expressway, was finished on Saturday. (Xinhua/Liu Kun)

Nov. 5, 2018 -- Photo taken on Nov. 3, 2018 shows the construction site of Keku Bridge in Aba Tibetan and Qiang Autonomous Prefecture, southwest China`s Sichuan Province. The closure of Keku Bridge, a key project of Wenchuan-Ma`erkang expressway, was finished on Saturday. (Xinhua/Liu Kun)