Deletion of Qiulin Zhang

Comment: Opera is a very heavily documented art form.  She started singing professionally over 20 years ago, yet in all that time, she has no mention at all in any books except a few trivial mentions in a few books e.g. http://books.google.com/books?id=0hygSQAACAAJ&dq=%22Qiulin+Zhang%22++opera&hl=en&ei=VqxyTpDGNePTiALnptnmBw&sa=X&oi=book_result&ct=result&resnum=1&ved=0CDEQ6AEwAA.   That tells me she is a very, very minor singer.   Web soruces are a bit more significant, and seem to show that she meets  requirements, so I'll go with a weak keep
Stance: keep
Cited policy: Wikipedia:Notability (WP:ENTERTAINER)