You should know by looking at the answer. The training of Guanglianda is always free and basic. It's all software operation, no matter how deep it is. You can check Baidu, quantity surveyor online school. That's what really teaches you the number of projects. One * * * teaches you four sets of projects, villas and basements. Most teachers don't talk about this, so it should be the only one in China. Moreover, this online school is the only online platform in China, which specializes in budget training. Training with Guanglianda's software is much better. Teach you how to do engineering, as well as standard documents, and set prices. They are all practical. See for yourself.