The Central Power Project Management Board  has invited international competitive bids for the supply of primary equipment and materials for the extension of overhead line bays at the 500 kV Quang Ninh substation and the 500 kV Hiep Hoa substation, connected by the 500 kV Quang Ninh-Hiep Hoa transmission line (second circuit). This project also forms a part of the IBRD-funded TEP. The last date for submission of bids was December 24, 2014. The bids are currently under evaluation.