The 2019 ATP Challenger China International – Nanchang was a professional tennis tournament played on hard courts. It was the fifth edition of the tournament which was part of the 2019 ATP Challenger Tour. It took place in Nanchang, China between 22 and 28 April 2019.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Jordan Thompson | 67 | 1 | ||
 India | ||||
 Australia | Alex Bolt | 143 | 3 | |
| India | Ramkumar Ramanathan | 157 | 4 | |
| Australia | James Duckworth | 158 | 5 | |
| Australia | Jason Kubler | 161 | 6 | |
 Serbia | Nikola Milojević | 164 | 7 | |
 Spain | Enrique López Pérez | 182 | 8 | |
 Kazakhstan | Aleksandr Nedovyesov | 190 | 9 | |
 France | Maxime Janvier | 200 | 10 | |
 Japan | Go Soeda | 207 | 11 | |
 United Kingdom | Jay Clarke | 211 | 12 | |
 Czech Republic | Adam Pavlásek | 213 | 13 | |
 Korea, Republic of | Lee Duck-hee | 236 | 14 | |
 Belarus | Uladzimir Ignatik | 239 | 15 | |
| Japan | Kaichi Uchida | 243 | 16 |
The following players received wildcards into the singles main draw:
Cui Jie Gao Xin He Yecong Sun Fajing Te RigeleThe following players received entry into the singles main draw as alternates:
The following players received entry into the singles main draw using their ITF World Tennis Ranking:
Bai Yan
Teymuraz Gabashvili Jacob Grills Rio NoguchiThe following players received entry from the qualifying draw:
Wu HaoSee main article: 2019 ATP Challenger China International – Nanchang – Singles.
Andrej Martin def. Jordan Thompson 6–4, 1–6, 6–3.See main article: 2019 ATP Challenger China International – Nanchang – Doubles.
Tristan-Samuel Weissborn def. Alex Bolt / Akira Santillan 6–2, 6–4.