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A worker walks passing lines of finished rail track slabs at a construction site in Cikampek, West Java Province, Indonesia, March 24, 2021. China's Sinohydro Bureau 7 Co., Ltd. on Wednesday completed the precasting work of 15,390 reinforced concrete rail track slabs for the Jakarta-Bandung High Speed Railway (HSR), the railway's operator said. (Xinhua/Zulkarnain)