![](http://www.ecns.cn/hd/2023/04/07/a1c4cb5b413f4c8a91db38c473837a28.jpg)
A Boeing 737-800CF aircraft is painted at the One-stop Aircraft Maintenance Industry Base of Hainan Free Trade port in Haikou, south China's Hainan Province, April 6, 2023. (Photo: China News Service/Luo Yunfei)
The Hainan Free Trade Port offered preferential tax exemptions for maintenance of aviation materials.
![](http://www.ecns.cn/hd/2023/04/07/9118cea94496495f9033fd09d2af7481.jpg)
Staff members make preparation work at the painting hangar of the Hainan Free Trade Port One-stop Aircraft Maintenance Industry Base in Haikou, south China's Hainan Province, April 6, 2023. (Photo: China News Service/Luo Yunfei)
![](http://www.ecns.cn/hd/2023/04/07/8a889d515b7c4d8fbe6e0fd356374c7c.jpg)
Staff members make preparation work at the painting hangar of the Hainan Free Trade Port One-stop Aircraft Maintenance Industry Base in Haikou, south China's Hainan Province, April 6, 2023. (Photo: China News Service/Luo Yunfei)
![](http://www.ecns.cn/hd/2023/04/07/094c42e999214651b8fc8cc8cd20579e.jpg)
An inbound aircraft undergoes maintenance checks at the One-stop Aircraft Maintenance Industry Base of Hainan Free Trade Port in Haikou, south China's Hainan Province, April 6, 2023. (Photo: China News
![](http://www.ecns.cn/hd/2023/04/07/564bfa1b2b2441e4ab3ae9ced4591bff.jpg)
An inbound aircraft is transferred from the painting hangar to the maintenance hangar at the One-stop Aircraft Maintenance Industry Base of Hainan Free Trade Port in Haikou, south China's Hainan Province, April 6, 2023. (Photo: China News Service/Luo Yunfei)
![](http://www.ecns.cn/hd/2023/04/07/db67b1325dff4a8ebbfa2b0b2f0d37b4.jpg)
An inbound aircraft undergoes maintenance checks at the One-stop Aircraft Maintenance Industry Base of Hainan Free Trade Port in Haikou, south China's Hainan Province, April 6, 2023. (Photo: China News Service/Luo Yunfei)
![](http://www.ecns.cn/hd/2023/04/07/7c4be9f8fc024973af07abbeaff78195.jpg)
An inbound aircraft is transferred from the painting hangar to the maintenance hangar at the One-stop Aircraft Maintenance Industry Base of Hainan Free Trade Port in Haikou, south China's Hainan Province, April 6, 2023. (Photo: China News Service/Luo Yunfei)