A staff member walks by spillways at Xin'an River Reservoir in east China's Zhejiang Province, July 7, 2020. The Xin'an River Reservoir, an important flood control project in the upper reaches of the Qiantang River, opened spillways for the first time in nine years on Tuesday to lower the crest of the floods. This is also the seventh time spillways of the reservoir were opened to release floodwaters since it was built in the 1950s. (Xinhua/Weng Xinyang)

Water gushes out from spillways at Xin'an River Reservoir in east China's Zhejiang Province, July 7, 2020. The Xin'an River Reservoir, an important flood control project in the upper reaches of the Qiantang River, opened spillways for the first time in nine years on Tuesday to lower the crest of the floods. This is also the seventh time spillways of the reservoir were opened to release floodwaters since it was built in the 1950s. (Xinhua/Weng Xinyang)

Panoramic photo taken with a mobile phone on July 7, 2020 shows a view of water gushing out from spillways at Xin'an River Reservoir in east China's Zhejiang Province. The Xin'an River Reservoir, an important flood control project in the upper reaches of the Qiantang River, opened spillways for the first time in nine years on Tuesday to lower the crest of the floods. This is also the seventh time spillways of the reservoir were opened to release floodwaters since it was built in the 1950s. (Xinhua/Weng Xinyang)

Water gushes out from spillways at Xin'an River Reservoir in east China's Zhejiang Province, July 7, 2020. The Xin'an River Reservoir, an important flood control project in the upper reaches of the Qiantang River, opened spillways for the first time in nine years on Tuesday to lower the crest of the floods. This is also the seventh time spillways of the reservoir were opened to release floodwaters since it was built in the 1950s. (Xinhua/Weng Xinyang)

A staff member works at the generator room at Xin'an River hydropower station in east China's Zhejiang Province, July 7, 2020. The Xin'an River Reservoir, an important flood control project in the upper reaches of the Qiantang River, opened spillways for the first time in nine years on Tuesday to lower the crest of the floods. This is also the seventh time spillways of the reservoir were opened to release floodwaters since it was built in the 1950s. (Xinhua/Weng Xinyang)

Staff members work at the main control room at Xin'an River hydropower station in east China's Zhejiang Province, July 7, 2020. The Xin'an River Reservoir, an important flood control project in the upper reaches of the Qiantang River, opened spillways for the first time in nine years on Tuesday to lower the crest of the floods. This is also the seventh time spillways of the reservoir were opened to release floodwaters since it was built in the 1950s. (Xinhua/Weng Xinyang)

Water gushes out from spillways at Xin'an River Reservoir in east China's Zhejiang Province, July 7, 2020. The Xin'an River Reservoir, an important flood control project in the upper reaches of the Qiantang River, opened spillways for the first time in nine years on Tuesday to lower the crest of the floods. This is also the seventh time spillways of the reservoir were opened to release floodwaters since it was built in the 1950s. (Xinhua/Weng Xinyang)

Water gushes out from spillways at Xin'an River Reservoir in east China's Zhejiang Province, July 7, 2020. The Xin'an River Reservoir, an important flood control project in the upper reaches of the Qiantang River, opened spillways for the first time in nine years on Tuesday to lower the crest of the floods. This is also the seventh time spillways of the reservoir were opened to release floodwaters since it was built in the 1950s. (Xinhua/Weng Xinyang)

A staff member checks facilities at Xin'an River hydropower station in east China's Zhejiang Province, July 7, 2020. The Xin'an River Reservoir, an important flood control project in the upper reaches of the Qiantang River, opened spillways for the first time in nine years on Tuesday to lower the crest of the floods. This is also the seventh time spillways of the reservoir were opened to release floodwaters since it was built in the 1950s. (Xinhua/Weng Xinyang)

Water gushes out from spillways at Xin'an River Reservoir in east China's Zhejiang Province, July 7, 2020. The Xin'an River Reservoir, an important flood control project in the upper reaches of the Qiantang River, opened spillways for the first time in nine years on Tuesday to lower the crest of the floods. This is also the seventh time spillways of the reservoir were opened to release floodwaters since it was built in the 1950s. (Xinhua/Weng Xinyang)