Last year I bought a one way ticket Bangkok to China and was refused at check in as I didn`t have an onward ticket though after talking to another airline flying the same route I was informed that they would have let me fly one-way as I had the correct visa for China.

My question is this time I have booked a round trip ticket BKK-GZ(China)-BKK

and as I have a round ticket do I stand the risk of the airline refusing me returning? GZ-BKK I will have a Thai tourist visa and an onward ticket back to China in October with a different airline.Also as for the onward ticket should it be for the 60 days of my valid visa or will the airline accept that the ticket can be changed?

As long as you have a visa there won't be a problem. The length of your stay is not an issue to the airline....as long as you have a visa.

What works if you can do it (Ive done it in the past)

If you have saved any of your old e-tickets, just open one with photoshop or paint or whatever computer program you want and change the info on it. Just make sure it is for a different airline than the one you are flying and make sure you put the correct dates and so on. The few times ive done this the airline only had a quick look at it and didn't check anything, just by showing them something, they were happy. The don't suspect many people do this as well. You can also show it to immigration if you have to, but ONLY as a last resort.

Example: I flew Singapore Airlines from Sydney on a one way ticket to BKK. At the check in counter in Sydeny, they wanted to see my return ticket because I didn't have a proper visa. I just showed them the fake printed out e-ticket (it was an old copy for a one way flight from BKK to Tokyo on Jal) I just changes the dates on photoshop) and it worked!

That way you wont need to worry about anything or you wont need to purschase a return ticket. As long as you only show it to the airline staff at check in if they ask, you should be sweet, because they never check it properly.

You can even use someones elses, just change the name!

thank you for e-tickets!!!