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Welcome to YSPA. Thank you for downloading this APP, we will continue to optimize the app and improve the user experience.






















































































In chemistry, a substance is any organic or inorganic substance that has a specific molecular identity.
The APP mainly provides common chemical substances in our lives, familiar with and learn the chemical formula of these substances.
Users can learn about chemicals by drawing or doodling, which are common substances in daily life. The aim is to combine chemicals with life, so that you can learn chemistry and understand the objects around you at the same time.