In addition, it is possible for users to extend their staking period from the shorter period to the longer one (i.e. extend staking period from 180 days to 1095 days). Also, it is possible add more MFD in the same staking batch to get more veMFD. For example, if a user staked 1 MFD for 3 year, the veMFD balance is 3. After 3 days, this user decides to add 2 more MFD to stake for 3 years and renew the previous 1 MFD’s staking period to 1095 days. Then the user will have (1+2)*3=9 veMFD balance. Please note that it is impossible to do those two operations reversely to either short the staking period nor to decrease the staking MFD volume.