The information collection in the city is mainly to cope with the recent increase in regional events. For example, a publishing house in Nanjing requires the recommendation of manuscripts by authors from Nanjing. Without knowing the city where the author is located, it is difficult to meet this requirement. Another example is that a reporter from a Shanghai magazine once asked to recommend two Shanghai authors for interviews. There were also difficulties in handling this. Another example is that Beijing often has author gatherings and some activities related to writing articles. Without knowing the author's location, it is difficult to gather more people. Therefore, please fill in your city to facilitate handling of some regional events.