History of question #239166
| When | Who | Action | New State |
|---|---|---|---|
| Jianyong Chen | Answer | Answered | |
| aditya neelkanth | Reopen | Open | |
| aditya neelkanth | Give more information | Open | |
| yong sheng gong | Answer | Answered | |
| Jianyong Chen | Comment | Answered | |
| Jianyong Chen | Comment | Answered | |
| aditya neelkanth | Reopen | Open | |
| Liping Mao | Answer | Answered |
