title: What can be a good cron expression for every trading hour in China stock market?
body: <p>China stocks only trades on weekdays, 9:30 - 11:30, then 13:00 - 15:00.</p>
  
  <p>I want to use one cron expression to pick out the following time spots:  9:30, 10:30, 11:30, 13:00, 14:00, 15:00. Basically every hour in the actual trading window.</p>
  
  <p>Is it possible at all?</p>