Electricians work on transmission lines over 190 meters above the ground in Zhoushan, east China's Zhejiang Province, Dec. 19, 2013. The 500 kilovolt cross-sea power transmission project is expected to put into operation by January in 2014. The 36.5-kilometer-long project, of which 8.39 kilometers coming across sea, has been the longest of its kind in China so far. (Xinhua/Xu Yu)