Does China have a role on Junta

There have been a lot of discussion on whether China have an influence on Junta or not. Dr Hla Kyaw Zaw from Burmese communist party, stated that China may not have power to change the mind set of the Junta. Singapore senior minister Lee Kuan Yew said that he was not sure if Beijing had the power to nudge Myanmar out of its isolation. But EU, and US believe that China can play a bigger role in Burmese politics.
Some says that sanctions does not work. Of course, it does not have much effect because neighbour countries such as China, India, Thailand do not involve in sanction. Border Trade between China and Burma increased tremendously after 1988 . Before 1988, most essential goods came from border trade with Thailand. Now all come from China. India also got benefits to have access for trade with china through india burma china road. It may not need to mention how Thailand got benefit as it got gas supply from Burma offshore oil field.
I understand that we have to work for ourself to achieve democracy. But foreign countries may not gave Junta in financial and moral support. Those countries are not a friend of Burmese People. Thus we may need to do some action to those countries. For china, they are preparing a big show for Olympic next year spending a lot of money and efforts. Boycotting Beiging Olympics may be a big shame for them.