Dear Kitsada Sawang-ngam,
Here is Yuhuan, from the organizing Committee of Yunnan International Education Exhibition.
As for the question of extending the payment deadline, I can try my best to apply for that. And the information of other Thai universities, you can turn to check on the Exhibitor List of our official website, then you will get the information, which already paid the bill. There is still some time left before the deadline of May9th 2014, it is possible that there are some other Thai universities will participate in our exhibition. Please feel free to contact me if you have any further questions.
I am so sorry for the delay of replying the email. Ms. Jianglin was taking a sick leave, but she will be back to the office tomorrow.
YuHuan
YIEE