"Tian Yue", China's independently-developed variable-diameter inclined shaft rock tunnel boring machine (TBM) and the world's first of its kind, was successively put into operation at the construction site of the Pingjiang Pumped Storage Power Station in Hunan on August 15. This machine can achieve 6.53 meters and 8 meters variable diameter excavation and 50-degree ultra-large slope climbing, filling the gap in the field of full-section mechanized construction equipment for super-large slope two-stage inclined shafts in China. It will play a demonstration role in boosting high-quality development of the pumped storage power stations in China and ensuring the technologies are self-developed and controllable. (Photo/Guo Liliang, Hunan Daily)

"Tian Yue", China's independently-developed variable-diameter inclined shaft rock tunnel boring machine (TBM) and the world's first of its kind, was successively put into operation at the construction site of the Pingjiang Pumped Storage Power Station in Hunan on August 15. This machine can achieve 6.53 meters and 8 meters variable diameter excavation and 50-degree ultra-large slope climbing, filling the gap in the field of full-section mechanized construction equipment for super-large slope two-stage inclined shafts in China. It will play a demonstration role in boosting high-quality development of the pumped storage power stations in China and ensuring the technologies are self-developed and controllable. The photo, taken on August 15, shows technicians operating "Tian Yue" to bore through the tunnel. (Photo/Guo Liliang, Hunan Daily)

"Tian Yue", China's independently-developed variable-diameter inclined shaft rock tunnel boring machine (TBM) and the world's first of its kind, was successively put into operation at the construction site of the Pingjiang Pumped Storage Power Station in Hunan on August 15. This machine can achieve 6.53 meters and 8 meters variable diameter excavation and 50-degree ultra-large slope climbing, filling the gap in the field of full-section mechanized construction equipment for super-large slope two-stage inclined shafts in China. It will play a demonstration role in boosting high-quality development of the pumped storage power stations in China and ensuring the technologies are self-developed and controllable. (Photo/Guo Liliang, Hunan Daily)

"Tian Yue", China's independently-developed variable-diameter inclined shaft rock tunnel boring machine (TBM) and the world's first of its kind, was successively put into operation at the construction site of the Pingjiang Pumped Storage Power Station in Hunan on August 15. This machine can achieve 6.53 meters and 8 meters variable diameter excavation and 50-degree ultra-large slope climbing, filling the gap in the field of full-section mechanized construction equipment for super-large slope two-stage inclined shafts in China. It will play a demonstration role in boosting high-quality development of the pumped storage power stations in China and ensuring the technologies are self-developed and controllable. (Photo/Guo Liliang, Hunan Daily)

"Tian Yue", China's independently-developed variable-diameter inclined shaft rock tunnel boring machine (TBM) and the world's first of its kind, was successively put into operation at the construction site of the Pingjiang Pumped Storage Power Station in Hunan on August 15. This machine can achieve 6.53 meters and 8 meters variable diameter excavation and 50-degree ultra-large slope climbing, filling the gap in the field of full-section mechanized construction equipment for super-large slope two-stage inclined shafts in China. It will play a demonstration role in boosting high-quality development of the pumped storage power stations in China and ensuring the technologies are self-developed and controllable. (Photo/Guo Liliang, Hunan Daily)

"Tian Yue", China's independently-developed variable-diameter inclined shaft rock tunnel boring machine (TBM) and the world's first of its kind, was successively put into operation at the construction site of the Pingjiang Pumped Storage Power Station in Hunan on August 15. This machine can achieve 6.53 meters and 8 meters variable diameter excavation and 50-degree ultra-large slope climbing, filling the gap in the field of full-section mechanized construction equipment for super-large slope two-stage inclined shafts in China. It will play a demonstration role in boosting high-quality development of the pumped storage power stations in China and ensuring the technologies are self-developed and controllable. (Photo/Guo Liliang, Hunan Daily)

"Tian Yue", China's independently-developed variable-diameter inclined shaft rock tunnel boring machine (TBM) and the world's first of its kind, was successively put into operation at the construction site of the Pingjiang Pumped Storage Power Station in Hunan on August 15. This machine can achieve 6.53 meters and 8 meters variable diameter excavation and 50-degree ultra-large slope climbing, filling the gap in the field of full-section mechanized construction equipment for super-large slope two-stage inclined shafts in China. It will play a demonstration role in boosting high-quality development of the pumped storage power stations in China and ensuring the technologies are self-developed and controllable. The photo, taken on August 15, shows the construction site of the Pingjiang Pumped Storage Power Station in Fushoushan Town, Pingjiang County. (Photo/Guo Liliang, Hunan Daily)

编辑：田梦瑶 吴雨霜（实习生）