You can find food teaching institutions to learn how to make Guokui offline.

If you find a professional master to learn from, you can go to a Guokui-making store to learn the technique. In this way, the master's fee is only a few hundred yuan. Of course, you can also work for the master for free while learning the craft.

Students start from scratch, and masters with ten years of experience in large-scale physical stores teach students the skills step by step. You can learn business sales even with zero foundation.