It's easier to get an operation certificate than the previous crane, and you can open more cranes.
In fact, if you only apply for a frontal crane operation certificate, the project is limited and you can only open a frontal crane, and it is very complicated to apply for an independent frontal crane certificate.
There must be a unit to give you a certificate. How to get it to the technical supervision bureau? After that, I have to study and take exams.