China EconomyInFocus|Drill-through of two-way river-crossing passway in central China By Editor in Chief - March 13, 2023 0 FacebookTwitterWhatsApp CHANGSHA, March 13, 2023 (Xinhua)– The drill-through of the right-line tunnel, together with the left-line tunnel drilled through a year ago, means the construction of the main part of the two-way river-crossing passway is near completion.