Photo taken on Jan. 6, 2017 shows the workshop in solar cell plant of Trina Solar in Bac Giang Province of Vietnam. The largest photovoltaic (PV) cell and module factory in Vietnam opened on Friday. Located in the northern province of Bac Giang, the 100-million-U.S.-dollar project is invested by China's photovoltaic modules manufacturer Trina Solar. (Xinhua/Le Yanna)