Cityus also travels to Guangzhou from CHKC; there are five round-trips a day, taking 31/2 hours.
Each round-trip from CHKC to Guangzhou takes about an hour.
mnli hypothesis: Each round-trip from CHKC to Guangzhou takes about an hour. premise: Cityus also travels to Guangzhou from CHKC; there are five round-trips a day, taking 31/2 hours.