Source: South China Morning PostClean-up crews worked on Wednesday to contain an oil spill in the Yellow Sea near the Chinese port city of Qingdao, a day after a tanker carrying about 1 million barrels of bitumen mix was struck by a bulk vessel in heavy fog.A preliminary study estimated about 500 tonnes (3,420 barrels) of oil had been spilled but further assessment was needed, an official from the Shandong Maritime Safety Administration said on condition of anonymity.The administration said on its Weibo account on Wednesday…Read More