It might be because of the Chinese passport, they seem a bit lazy to deal with you.

The car pickup and return process was very organized. A great car rental experience.

에이비스 사무실이 공항내부에 있어 외부에서는 사무실을 찾을 수 없었습니다. 공항에서 근무하시는 분이 대신 전화 주셔서 차를 빌릴수 있었습니다.

The pick up process was easy and hassle free. However, the drop off was otherwise. Due to language barrier I had procced to park the car at the airport parking and incurred parking fee of THB20. There was no clear explanation on the drop of process. Overall I am satisfied with the service.

Easy and hassle free car booking app.

Like: The counter for pick up and drop off is just at the airport itself. Though had to walk to the other terminal where we alighted, but thankful didnt need to travel out of airport in the traffic jam to retrieve the car.
Dislike: Communication was a slight issue as we couldnt speak in thai, but we still manage to get what we wanted.