Good afternoon, Phramaha Tharabun
Of course we can be friend. I had been to Nong Khai in 2009, but just spent 1 night there. A beautiful small town it is...
You are welcome to Indonesia. Borobudur is indeed a great Buddhist temple. Recently it was covered by volcanic ashes due to Mount Merapi eruption on Oct 26, but now it's open to public.
The best time of the year to visit Borobudur is on Vesak day since we have Vesak celebration at the temple. It's an annual event and next year it'll be on May 17. However you can come anytime... it's a great place to be.
Smile from Indonesia,
Lina