At three o'clock, the hand difference is 90.
So 90/(6-0.5) = 900/55.
After 900/55, the first coincidence occurred.
2. The alignment difference is 270.
270/(6-0.5)=2700/55 points
After another 2700/55 minutes, the hour hand and the minute hand Zhang Kaicheng in a straight line for the first time.