China's Sinopec Zhejiang Zhoushan Petroleum, or Sinopec Zhoushan, which began selling bunker fuel at the Shanghai port in mid-June, aims to triple sales there to 30,000 mt/month by year-end, a company source said Thursday. The company, a wholly-owned subsidiary of state-owned Sinopec, currently sells about 10,000 mt/month of bunker fuel at the port. In addition to Sinopec Zhoushan, four other companies -- -- Chimbusco, Sinobunker, China Changjiang Bunker Sinopec and Brightoil -- sell bunker fuel at the Shanghai port which sees bunker demand of about 100,000 mt/month. Meanwhile, the company plans to start marine gasoil sales at the Shanghai port at the end of September or October, the source said, adding that it is also considering adding 100,000 cu m of storage tanks at Yangshan. The company currently has 200,000 cu m of storage at Yangshan and 30,000 cu m of storage in Gaoqiao. Both ports are in Shanghai city. Besides the Shanghai port, Sinopec Zhoushan, which is based in Zhoushan in Zhejiang province, also sells bunker fuel at Zhoushan port, Ningbo port and Inner Changjiang River Port. It also operates five barges, with a total capacity of 43,000 mt.