Cambodian Prime Minister Samdech Techo Hun Sen (C) attends the inauguration ceremony of the Battambang Conch Cement Company Limited in Battambang Province, Cambodia, on May 31, 2018. Battambang Conch Cement Company Limited, a 230-million-U.S.-dollars joint venture between Cambodian and Chinese companies, was inaugurated here Thursday, bringing the total number of the cement production plants in Cambodia to four. (Xinhua/Mao Pengfei)