2.2011.10.1-2012.1is included in the first time period, that is, 20/kloc-0. The start time of the second line can only be after 20 13.6. Just delete the second line.
3. If 2011.10.1-2012.10/should be added, which will be completed in three stages. 20 1 1. 10. 1-20 12. 10. 1,20 12. 10.2-20 13.6.30