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It has been a long time since we last saw one another. I know that you have all been very busy. On behalf of the staff from the Department of Student Affairs of the State Education Commission, I would like to express our gratitude for your support to our work. Meanwhile, my gratitude also goes to the leaders of Nanjing City and Jiangsu Province for their help and support for this meeting.
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Jiao Shu-qing (1994) studied this question.
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