Members of the special unit onboard the frigate "Yantai" of the 11th Chinese naval escort flotilla are seen as the frigate arrives at the Bulgarian Black Sea port of Varna on Aug. 5, 2012. The frigate "Yantai" of the 11th Chinese naval escort flotilla on Sunday arrived at the Bulgarian Black Sea port of Varna to make a five-day goodwill visit. It is the first visit of Chinese navy ship in Bulgaria ever. [Xinhua]