China\'s trade surplus may drop to zero, or even negative digits in next two years, said the central bank advisor on Saturday. The country\'\'s narrowing trade surplus is expected to fall to 150 billion U.S. dollars this year, with its ratio in the GDP dropping to 1.5 percent from 8 percent over past years, he said. In the first 10 months of this year, the trade surplus narrowed by 15.4 percent year-on-year to 124.02 billion U.S. dollars, with October\'\'s figure plunging 36.5 percent to 17.03 billion U.S. dollars, data with the General Administration of Customs show, according to Xinhua news agency.