 Complete the following phrase:  When the World Cup circuit started again in the fall of 2011, Yu began to dominate in the 500 m. At the first meeting in Chelyabinsk, she won both of the races over that distance, each time with a winning margin over 0.4 seconds. After skipping the second meeting in Astana, she likewise went on to triumph in both 500 m races in Heerenveen and also gained a second place in the 1000 m. Obviously, she could be a major contender for the 