Design and research on carbon emission trading system in China 并列题名：Design and research on carbon emission trading system in China China carbon emission trading system design Research on foreign trade system in China 并列题名：Research on foreign trade system in China Past and present carbon emission in China Forming research on national innovation cultural system in China Research on the house financing system in China 并列题名：Research on the house financing system in China Construction of China's carbon emission trading system