Assertion: jade carving | /r/HasProperty | major art form
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text: For a long time thereafter, jade remained the exclusive preserve of the royal imperial families, and since the time of Song Dynasty art (960-1279), jade carving has been seen as a major art form, reaching its peak during the era of Ming Dynasty art (1368-1644), when another world renowned artform - blue and white Chinese porcelain - was also achieving its apogee.