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The new version of FLYCHK is here:

1. improved mixture option: Before, one can only establish a fixed for a mixture option. Now, one can specify the time-dependent of the other species in a history file. An example will be presented shortly.
2. fast computation for non-Maxwellian case FLYCHK can use an arbitrary electron energy distribution function f_e(E) for collisional rates but it takes much longer to run the case since rate calculations involve the numerical integration over f_e(E). A new scheme is implemented to expedite the calculations.

Q&A section is added.

1. A few forbidden transitions are added for He- and Li-like ions of Z<27.
2. As a result, the relative Li-like satellites of Z <27 ions may be different from the old calculations.
3. Collisional data by using arbitrary electron energy distribution function are corrected.