Is there a free chinese vocabulary online learner?

Something like what freerice.com, I need to practice my written and reading part of chinese. Have anything similar, I don’t perfer lists of chinese vocab just a flash card type of system.
Thanks

Perhaps this might help?
http://www.mandarintools.com/flashcard.html
Learn Chinese Vocabulary – City Buildings Vocabulary

American English Pronunciation Patterns Professional 3.0

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