People visit the Supertree grove OCBC Skywalk on the first day of reopening at Singapore's Gardens by the Bay on Sept. 7, 2020. (Photo by Then Chih Wey/Xinhua)

People visit the Supertree grove OCBC Skywalk on the first day of reopening at Singapore's Gardens by the Bay on Sept. 7, 2020. (Photo by Then Chih Wey/Xinhua)

People visit the Supertree grove OCBC Skywalk on the first day of reopening at Singapore's Gardens by the Bay on Sept. 7, 2020. (Photo by Then Chih Wey/Xinhua)

People visit the Supertree grove OCBC Skywalk on the first day of reopening at Singapore's Gardens by the Bay on Sept. 7, 2020. (Photo by Then Chih Wey/Xinhua)

People visit the Supertree grove OCBC Skywalk on the first day of reopening at Singapore's Gardens by the Bay on Sept. 7, 2020. (Photo by Then Chih Wey/Xinhua)

People visit the Supertree grove OCBC Skywalk on the first day of reopening at Singapore's Gardens by the Bay on Sept. 7, 2020. (Photo by Then Chih Wey/Xinhua)