1644-1912 1719-1763 approximately1717-1763 authorshiptsʼao baoyu(fictitiouscharacter) cao characters chinesefiction concordancescao concordances曹雪芹 criticism dictionaries eroticisminliterature etccao etc曹雪芹 fiction history historyandcriticism hsüeh-chʻin indexes jia language lindaiyucao qingdynasty statisticstsʼao studyandteachingcao studyskills textualcao 曹雪芹 林黛玉曹雪芹