China did what China does at the Maria Lenk Aquatics Center Wednesday in Rio as 17-year-old Si Yajie and 15-year-old Ren Qian placed first and second in the women's individual 10m platform preliminary.
Si landed atop the field with a consistant 397.45-point program. Ren was right behind her with a total of 385.80.
Both Americans advanced to the semifinal. Jessica Parratto placed a distant third with 346.80 points, posting her highest-scoring dive in the final round with a 78.40-point back 2.5 pike with 1.5 twists. And Katrina Young placed 12th with 313.85 points.
"This is prelims, and it’s a long event. I’m glad it was solid," Parratto said. "Luckily, that last dive kind of pumped me up, which was nice, but in semifinals it starts right over from scratch. Normally what I want to think about is being consistent and landing on my head, so hopefully tomorrow morning I can do the same thing."
"I’m really pleased with (my list)," Young said. "I was a little bit over on a couple dives, but I had a lot of adrenaline and I had to reel it in a little bit. I was so excited to be on that platform representing the U.S. I did what I needed to do to get back here tomorrow morning, so I’m happy."
Reigning World champion Kim Kuk-hyang of North Korea made a shocking early exit. She was right on the bubble in 17th place going into her fourth-round dive, when she miscalculated and over rotated before entry, resulting in a huge splash and a 26.10-point attempt. Wednesday provided stark contrast to her final dive in Kazan, Russia, in July of 2015 when she received 10s to total 397.05 points and win gold at the World Championships, but the 17-year-old managed just 263.20 points in the Rio Olympics prelim.
Brazil's Ingrid de Oliveira had to block out the noise as the hometown crowd erupted each time she climbed the tower. In ninth place after three rounds, Oliveira missed her entry on her fourth dive and scored just a 14.50. Despite a strong final dive, Oliveira finished in 22nd place with 281.90 points and did not qualify for the semifinal.
China has taken gold in the women's individual 10m platform at each of the past two Olympic Games. This year's competitors -- aged 15 and 17 -- are both making their Olympic debut, but they're already accomplished divers. Back in February, Ren placed first and Si placed second in the 2016 World Cup in Rio -- the most recent major international diving competition.
The following 18 competitors advanced to Thursday's 9am semifinal: Si Yajie (CHN), Ren Qian (CHN), Jessica Parratto (USA), Melissa Wu (AUS), Tonia Couch (GBR), Pandelela Rinong Pamg (MAS), Meaghan Benfeito (CAN), Nur Dhabitah Sabri (MAS), Roseline Filion (CAN), Minami Itahashi (JPN), Ekaterina Petukhova (RUS), Katrina Young (USA), Paola Espinosa (MEX), Ganna Krasnoshlyk (UKR), Yulia Prokopchuk (UKR), Elena Wassen (GER), Brittany O'Brien (AUS), Kim Un-hyang (PRK).
The following individuals were eliminated from competition: Laura Marino (FRA), Alejandra Orozco (MEX), Maria Kurjo (GER), Ingrid Oliveira (BRA), Sarah Barrow (GBR), Maha Abdel Salam (EGY), Kim Kuk-hyang (PRK), Noemi Batki (ITA), Villo Kormos (HUN), Yulia Timoshinina (RUS).
Jessica Parratto's list
1. Forward 3.5 pike -- 3.0 degree of difficulty -- 69.00 points
2. Back 3.5 tuck -- 3.3 -- 74.25
3. Inward 3.5 tuck -- 3.2 -- 60.80
4. Armstand back triple tuck -- 3.3 -- 64.35
5. Back 2.5 pike 1.5 twists -- 3.2 -- 78.40
Total score: 346.80
Katrina Young's list
1. Forward 3.5 pike -- 3.0 -- 49.50
2. Back 3.5 tuck -- 3.3 -- 64.35
3. Armstand back double free 1.5 twist -- 3.2 -- 73.60
4. Inward 3.5 tuck -- 3.2 -- 72.00
5. Back 2.5 pike 1.5 twists -- 3.2 -- 54.40
Total score: 313.85
USA Diving contributed to this report