Please view this link:
https://travel.com.vn/du-lich/2-9097f15c-821b-4101-b70d-d4dde71e5cdf/dat-tour-trong-nuoc.aspx
I wanna build site with multi-step registration like this. But i have problem is, when user enter information, which best solution for store temporary information until registration is finished, information will be updated in database. Thank everyone so much