In recent days, in the knowledge-service community that focuses on business product jobs in the country [all are product managers], one on “the areas in which the recent decline in the APP user logo will be analysed?” Questions continued to be fermented, with one week of publication, and a radius of 10,000 was reached. Users [three ice blocks] gave their views in their responses - analysis can be carried out from five dimensions: Whether the statistical calibre is consistent, whether the logg...