Question: Who owns Shangdong Airlines which operates mainly domestic trunk routes and whose focus city is Qingdao in Shandong Province, China?
Sentence (from "Shandong Airlines"): (, nicknamed SDA or 山航 "Shānháng") is an airline based in the Shandong Airlines Center (山东航空大厦 "Shāndōng Hángkōng Dàshà") in Jinan, Shandong, China.
Relevant evidence: No