Introduction to Tonghan Chuntang: Tonghan Chuntang, a time-honored drugstore, was founded in the 48th year of Qianlong reign of the Qing Dynasty. It used the business model of a factory behind the store to operate various types of specialty decoction pieces, various types of pills, powders, ointments, and toilet wine. Its paste recipe is very popular in old Shanghai due to its characteristics of "transparent, bright and waxy".

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