As an AI language model, I don't have real-time data access, but I can provide you with some context. China Kantner is not a widely recognized public figure, and without specific context, it's difficult to determine who or what you are referring to. If you're referring to a person, their age would be a private matter unless they are a public figure and have shared that information themselves.
However, if you are referring to the Kantner family in relation to Apollo 7 astronaut Walter "Wally" Schirra and his wife Jo Kantner Schirra, who had a daughter named China, then you would need to calculate her age based on her birth year. As of my last update in April 2023, China Kantner Schirra would be in her sixties, assuming she was born in the late 1950s or early 1960s.
Please note that this information is based on historical context and may not be accurate if you are referring to a different China Kantner or if there have been updates to her birth year.
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