| 1 | A | B | C | D |
| --- | --- | --- | --- | --- |
| 2 | Zhengzhou Open - Singles |  |  |  |
| 3 | Year | Champion | Runner-up | Score |
| 4 | ↑ WTA Premier event ↑ | ↑ WTA Premier event ↑ | ↑ WTA Premier event ↑ | ↑ WTA Premier event ↑ |
| 5 | 2018 | China Zheng Saisai | China Wang Yafan | 5–7, 6–2, 6–1 |
| 6 | 2017 | China Wang Qiang | China Peng Shuai | 3–6, 7–6(7–3), 1–1 ret. |
| 7 | ↑ WTA 125K event ↑ | ↑ WTA 125K event ↑ | ↑ WTA 125K event ↑ | ↑ WTA 125K event ↑ |
| 8 | 2016 | Russia Anastasia Pivovarova | China Lu Jingjing | 6–4, 6–4 |
| 9 | 2015 | China Wang Yafan | China Duan Yingying | 6–4, 6–4 |
| 10 | 2014 | China Zhang Kailin | China Xu Yifan | 7–5, 6–4 |
| 11 | ↑ ITF event ↑ | ↑ ITF event ↑ | ↑ ITF event ↑ | ↑ ITF event ↑ |

Question: What year did the Zhengzhou Open was first held as an ITF tournamenrvand when did it transition to a WTA type tournament?
Answer: The Zhengzhou Open has been held since 2014, as an ITF tournament and then as WTA 125K tournament in 2017 and 2018.