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As early as 2009, South Korean Jun Zheng founded "Death Experience Therapy" to deal with the high suicide rate in South Korea. The experiencer dressed in a white robe, wrote a will, held a portrait, lay in a coffin, enjoyed the "nothingness" after 10 minutes of death, thought about life, was freed and reborn. This kind of experience is very popular among young people in South Korea. There is a similar passage in the most popular Korean idol drama "You from Stars" in 2014.2. Create task scheduled events (call stored procedures)　　同年，研究生张宁加入，她跟几名伙伴都怀着航天梦，在于杰带领下，成功在嫦娥三号、四号加上了香港团队的名字。此外，文华南巡功劳不小，该赏。Visitor mode is to encapsulate some operations applied to a certain data structure. Once these operations need to be modified, the data structure that accepts this operation can be saved unchanged. Visitor mode is suitable for systems with relatively stable data structures. It reduces the coupling degree between data structures and operations acting on data structures, making the set of operations relatively free to change. The specific structure diagram is as follows:Enterprises belonging to Changzhou: Please contact Changzhou Tonghe to postpone the payment, Tel: 0519-86605082.