Your family isn't little, it should be beautiful:)
Your sister is elder or little?
It's good for you that you prefer Mandarin because it much more easy to study:)
China is my work:) I should know it well:)
As for Thailand, firstly I like the language - also have tones, sounds interesting, use nice letters for writing (not characters and not latin letter like vietnamese). Then I heard Thai people are very polite, cheerful, I also like that. I have never been to Thailand, but want to know more about it, also try to study some language (now I study low class consonants... :D)
You have already graduated from university, work as grafic designer?