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Lao Hu taught Yang Fann very carefully, and Yang Fann also learned very carefully. By the time all the Dendrobium Siderosum in the plastic bag was finished, Yang Fann was already on par with Lao Hu in terms of craftsmanship.

Then, Lao Hu began to pass on to Yang Fann the knowledge and trick of identifying iron skin Dendrobium Officinale: "Look, Younger Brother Yang