Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Rank | Rowers | Country | Time | Notes |
| --- | --- | --- | --- | --- |
| 1.0 | Xu Dongxiang , Chen Haixia | China | 6:57.58 | SA/B |
| 2.0 | Katrin Olsen , Juliane Rasmussen | Denmark | 6:58.63 | SA/B |
| 3.0 | Misaki Kumakura , Akiko Iwamoto | Japan | 7:05.67 | R |
| 4.0 | Yaima Velazquez , Ismaray Marrero | Cuba | 7:13.35 | R |
| 5.0 | Ko Young-Eun , Ji Yoo-Jin | South Korea | 7:39.70 | R |
Question:
Who were the rowers from china wh had a rank smaller than 4?
Answer:
Xu Dongxiang , Chen Haixia