“The Great Leap,” a basketball-centric play, is coming to Old Town San Diego’s Cygnet Theatre Jan. 22, 2020. Written by multi-award-winner Lauren Yee, it was one of the 10 most-produced plays in the United States in 2019, along with her “Cambodian Rock Band,” recently staged at La Jolla Playhouse. “The Great Leap,” which premiered in Denver in 2018, is about an American basketball team going to China for an exhibition game. There’s more than a game at stake; there are long-buried personal histories, a clash of dreams and ambitions, and the main setting is Beijing in 1989, when student protesters were about to be massacred in Tienanmen Square. With all this going on, there’s still plenty of humor — one of the playwright’s conspicuous gifts.