 Complete the following phrase:  The 2017 Marvellous 12  was a qualifying event organized by the Chinese Table Tennis Association, Tencent Sports and Shenzhen Municipal Culture, Sports and Tourism Bureau. It was held in Shenzhen, China from 3 to 10 March, 2017. It was the first edition of the tournament. Winners of Phase 1 and Phase 3 of the mens and womens singles event, namely Fan Zhendong, Lin Gaoyuan, Liu Shiwen, and Ding Ning, were each guaranteed a spot to represent China in the 