Three days. "Smart Homework" is a service platform organized by Jiangxi Provincial Department of Education to implement the national "double reduction" policy and provide personalized homework counseling for teachers, students and parents of primary and secondary schools in the province free of charge. Jiangxi Xinhua Cloud Education Technology Co., Ltd. and the Ministry of Education jointly launched the "smart homework" micro-lesson collection system in 2022. Topics can be reserved through the online intelligent operation system, and the course topics reserved by the system need to be submitted within 3 days, otherwise it will be considered invalid. The resources of "Intelligent Homework" cover the 20021Recommended Catalogue of Teaching Aids for Primary and Secondary Schools in Jiangxi Province and the exercise books of all subjects except politics in grades three to nine in Jiangxi Province.