Within 5 working days. Krypton space is a competition circle where elite college students gather online. By providing registration tools and one-stop service for college competitions, it is convenient for students to participate in and promote competitions, and then form a social circle based on competitions. Provide college students with information about their future development, so that motivated students can plan their lives more actively. If you sign up and want a refund, the software treaty shows that you will get a refund within 5 working days. Sai Krypton is a community dedicated to student competitions, students' future and scholars' experience sharing. It contains the latest and most comprehensive information of various activities, and it is also a perfect service platform for activities.