Earlier in the week, they had won the boys' and girls' team titles.
The only non-Chinese, Petrissa Solja, lost her girls' singles semifinal to Chinese top seed Zhu Yuling in the morning. And by the evening, Zhu rolled over Gu Yuting 4-0 for the crown.
The speed with which she disposed of her opponent tells only half of the story. The other half is all about superior technique, appetite to add another feather to her crown and prove her top billing right. With equal felicity, she won several winners both off her back and forehands and was never in any sort of trouble after going 2-0 up.
Soon after, Fan Zhendong overcame a two-game deficit to beat Lin Gaoyuan 4-2 (10-12, 7-11, 11-8, 11-6, 11-8, 11-4) to claim the boys' singles title. Fan took his time to size up his left-handed opponent and it cost him the first two games. Once Fan had things in his grip, it became easy as he went on to take the next four without much ado.
Second-seeded pair of Liu Gaoyuan and Xu Chenchao beat the top-seeded compatriots Fan Shengpeng and Fan Zhendong 4-0 (11-8, 11-9, 11-5, 11-6) to take gold in the boys' doubles.
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Gu Yuting and Zhu Yuling downed Gu Ruochen and Liu Gaoyang 4-3 for the girls doubles title. The mixed doubles gold went to Fan Zhendong and Liu Gaoyang, who beat the Lin Gaoyuan and Gu Ruochen combine 4-3.
The Results:
Junior Boys: Final: Fan Zhendong (Chn) bt Lin Gaoyuan (Chn) 10-12, 7-11, 11-8, 11-6, 11-8, 11-4; Semifinals: Fan Zhendong (Chn) bt Fan Shengpeng (Chn) 11-5, 11-6, 11-6, 4-11, 11-4, Lin Gaoyuan (Chn) bt Xu Chenhao (Chn) 11-4, 14-12, 7-11, 11-7, 7-11, 5-11, 11-6.
Doubles: Final: Lin Gaoyuan/Xu Chenhao (Chn) bt Fan Shengpeng/Fan Zhendong (Chn) 11-8, 11-9, 11-5, 11-6; Semifinals: Fan Shengpeng/Fan Zhendong (Chn) bt Hung Tzu-Hsiang/Lee Chia-Sheng (Tpe) 11-7, 13-11, 13-11, 11-8, Lin Gaoyuan/Xu Chenhao bt Yuto Muramatsu/Asuka Sakai (Jpn) 11-7, 15-13, 11-13, 11-2, 9-11, 11-5.
Junior Girls: Final: Zhu Yuling (Chn) bt Gu Yuting (Chn) 11-6, 11-5, 11-9, 11-8; Semifinals: Zhu Yuling (Chn) bt Petrissa Solja (Ger) 12-10, 11-8, 11-7, 11-7, Gu Yuting (Chn) bt Gu Ruochen 11-9, 11-8, 9-11, 11-9, 11-5.
Doubles: Final: Gu Yuting/Zhu Yuling (Chn) bt Gu Ruochen/Liu Gaoyang (Chn) 8-11, 11-5, 5-11, 7-11, 11-6, 11-9, 11-4; Semifinals: Gu Yuting/Zhu Yuling (Chn) bt Miyu Maeda/Ayuka Tanioka (Jpn) 11-7, 12-10, 11-4, 11-3, Gu Ruochen/Liu Gaoyang bt Irina Ciobanu/Bernadett (Rou) 11-7, 2-11, 12-10, 11-4, 11-2.
Mixed Doubles: Final: : Fan Zhendong/Liu Gaoyang (Chn) bt Lin Gaoyuan/Gu Ruochen (Chn) 4-11, 4-11, 12-10, 4-11, 11-9, 13-11, 11-9; Semifinals: Lin Gaoyuan/Gu Ruochen (Chn) bt Xu Chenhao/Zhu Yuling (Chn) 11-8, 11-9, 11-7, 11-8, Fan Zhendong/Li Gaoyang (Chn) bt Frederick Jost/Petrissa Solja (Ger) 6-11, 13-10, 5-111, 11-1, 8-11, 11-3, 12-6.