Yu Zidi made a breakthrough in the Chinese World Championship selections earlier this year when she performed world times in three events and qualified for the World Championship.
A age limit of 14 years has been introduced in the World Championship, but if you meet the qualifying limits, you are given a dispensation to compete.
Now she came to the start, a little smaller and a little thinner than most of the others, and swam just over a second above her personal record, but still advanced.
She passed the mixed zone, where the athletes meet the press, without giving any interviews.
Her 2.11,90 was 2,45 seconds behind Tara Kinder, Australia, who was the fastest in the heats, a hundredth of a second ahead of the world record holder and favorite Summer McIntosh, Canada.
