并列题名：Field research on the fransformation and upgrading of China commodities city in Yiwu Field research on the fransformation and upgrading of China commodities city in Yiwu 并列题名：Research on the transformation and upgrading of China's marine industry Research on the transformation and upgrading of China's marine industry 并列题名：Research on the transformation and upgrading of urban characteristic industries 并列题名：Research on the transformation and upgrading of open economy under the new situation in China research on transformation and upgrading of China's animation industry 并列题名：Research on transformation and upgrading of Wenzhou merchants 并列题名：Research on transformation and upgrading of processing trade 并列题名：Survey on the transformation and upgrading of Chinese firms