My understanding is the crime of cheating, because theft is carried out without people knowing or seeing it. Robbery requires the construction force to take other people's property without threatening the safety of the other party. Robbery is to take away other people's property when force threatens their life and health. In this case, A's behavior did not use any force before obtaining the property, but obtained the property through construction fraud, so it belongs to the crime of fraud. I hope it can help you.