Asian arts and artists take the spotlight this weekend in Lexington. Violinist Midori launches the 50th anniversary season for the Lexington Philharmonic. To the south, in Danville, violinist Hahn Bin offers a more contemporary take on classical music. And Sunday at the University of Kentucky, the Arts Asia Festival opens. Offering a preview is Rich Copley, who’s an arts and culture reporter for the Lexington Herald Leader.