The code for ECal invariant mass reconstruction iteration is in https://github.com/xilinliang/FCS-ECal-pi0-reconstruction.git 

 The detail instruction is in README.md .

  List of run number:

• Period 1 : 01/05 (23005043) ~ : 23007007,23007011,23020009,230200010,23036001,23036002,23048002,23048003
• Period 2 : 02/17 (23048036) ~ : 23048050,23048051,23066013,23066017
• Period 3 : 03/07 (23066056) ~ : 23067001,23067002,23073042,23073043
• Period 4 : 03/14 (23073059) ~ : 23074017,23074018,23080044,23080045
• Period 5 : 03/21 (23080057) ~ : 23081008,23081009,23087033,23087034
• Period 6 : 03/28 (23087057) ~ : 23087070,23087072,23094044,23094045
• Period 7 : 04/04 (23094050) ~ : 23095010,23095011,23101005,23101013
• Period 8 : 04/11 (23101043) ~ : 23101063,23101064,23108014,23108015

  Generated MuDst files: /star/*/reco/production_pp500_2022/ReversedFullField/pp500_22_DEV_fcs/$year/$day/$run/st_fwd_*.MuDst.*

  Example and explanation: see attachment