When was the standard of reducing the burden by three to five at the grass-roots level put forward?

When was the standard of reducing the burden by three to five at the grass-roots level put forward? Since 20 19, the CPC Central Committee has issued a series of arrangements to reduce the burden on grassroots cadres. All localities and departments have worked hard and made practical moves, so that grassroots cadres have more time and energy to implement them, solved some stubborn diseases, stopped some unhealthy trends, and a solid report card has made grassroots cadres and the masses applaud. However, we should also be soberly aware that these problems, such as one-sided emphasis on "territorial management", keen shirking responsibility, unreasonable pressure on grassroots cadres, too high frequency of supervision and inspection, compulsory photo punching, and untimely response, have made grassroots cadres miserable.