Qing (清) is the Mandarin word for "clear," "pure," or the blue-green of pristine water. Also 青 (the blue-green color of nature). The Qing dynasty (1644-1912) was the last imperial dynasty of China.
Qing does not currently appear in the US Social Security Administration's top 1,000 girls' names, so we don't publish a US rank or birth count for it. That says nothing about the name's standing elsewhere in the world — only that it sits outside the ranked US data we rely on.
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In Pythagorean numerology the letters of Qing reduce to 2, The Peacemaker. This is a traditional interpretive system, not a factual claim about the name.