Bulgaria's regional development ministry said on Monday that Chinese company CITIC Construction has expressed investment interest towards two major road infrastructure projects in Bulgaria.The projects envisage the construction of a tunnel under the Shipka peak in the Balkan mountain range and a motorway connecting the Bulgarian cities of Russe, on the Danube river, to Veliko Tarnovo, the ministry said in a statement.Once built, the 133-kilometre motorway connecting Russe to Veliko Tarnovo will become part of pan-European transport Corridor 9 linking Helsinki in Finland to the Greek Aegean port of Alexandroupolis. CITIC Construction is the construction and engineering subsidiary of the CITIC Group, a Chinese state-owned business conglomerate.Bulgaria's regional development minister Nikolay Nankov and representatives of CITIC Construction discussed options for signing a Memorandum of Cooperation (MoC) which will include specific parameters for establishing a public-private partnership, according to the statement.