Users Need to Apply for a New License, What Are

Users need to apply for a new license, what are the correct steps? ( ) (Choose 3 answers)

A) project installation personnel in accordance with the unified template feedback "video license application form", at the same time with the original license file
B) Huawei engineers according to the application form the contract number inside the template, check the contract number in the license information and production license file in detail
C) engineering installation personnel will cover the new license file to the original file, validating license information after restarting the service
D) Additional copies of the original documents to do a temporary license to use