function CommonFun.calcDamage_21(srcUser, targetUser, params, damageParam, logger)
  local Str = srcUser:GetProperty("Str")
  local Dex = srcUser:GetProperty("Dex")
  local Luk = srcUser:GetProperty("Luk")
  local Atk = srcUser:GetProperty("Atk")
  local AtkPer = srcUser:GetProperty("AtkPer")
  local DamIncrease = srcUser:GetProperty("DamIncrease")
  local IgnoreDef = 0
  local IgnoreDef1 = srcUser:GetProperty("IgnoreDef")
  local IgnoreDef2 = srcUser:GetProperty("IgnoreEquipDef")
  if targetUser.boss or targetUser.mini then
    IgnoreDef = IgnoreDef1
  else
    IgnoreDef = IgnoreDef1 + IgnoreDef2
  end
  if 1 <= IgnoreDef then
    IgnoreDef = 1
  end
  local Refine = srcUser:GetProperty("Refine")
  local AttrEffect = targetUser:GetProperty("AttrEffect")
  local bits = CommonFun.getBits(AttrEffect)
  local Def2 = targetUser:GetProperty("Def")
  local DefPer2 = targetUser:GetProperty("DefPer")
  local Vit2 = targetUser:GetProperty("Vit")
  local VitPer2 = targetUser:GetProperty("VitPer")
  local DamReduc2 = CommonFun.calcDamReDuc(srcUser, targetUser)
  local LongRangeDamReduc2 = targetUser:GetProperty("LongRangeDamReduc")
  local RefineDamReduc = targetUser:GetProperty("RefineDamReduc")
  local damChangePer = damageParam.damChangePer
  local raceparam = CommonFun.CalcRaceParam(srcUser, targetUser, params, damageParam, logger)
  local bodyparam = CommonFun.CalcBodyParam(srcUser, targetUser, params, damageParam, logger)
  local elementparam = CommonFun.CalcElementParam(srcUser, targetUser, params, damageParam, logger)
  local bossparam = CommonFun.CalcBossParam(srcUser, targetUser, params, damageParam, logger)
  local raceparam2 = CommonFun.CalcRaceParam2(srcUser, targetUser, params, damageParam, logger)
  local bodyparam2 = CommonFun.CalcBodyParam2(srcUser, targetUser, params, damageParam, logger)
  local elementparam2 = CommonFun.CalcElementParam2(srcUser, targetUser, params, damageParam, logger)
  local bossparam2 = CommonFun.CalcBossParam2(srcUser, targetUser, params, damageParam, logger)
  local skillID, skillLevel = CommonFun.UnmergeSkillID(params.skillIDAndLevel)
  local skilllv_1 = srcUser:GetLernedSkillLevel(127)
  local atk_add = 0
  if 10 < skilllv_1 and (skillID == 300 or skillID == 113 or skillID == 252 or skillID == 253) then
    atk_add = Dex * ((skilllv_1 - 10) * 0.5)
  end
  local NormalAtk = 0
  if skillID == 300 or skillID == 113 or skillID == 252 or skillID == 253 then
    local NormalAtkAttr = srcUser:GetProperty("NormalAtk")
    NormalAtk = NormalAtkAttr + 3 * Dex
  end
  local SpAtk = 0
  if srcUser:HasBuffID(131096) and (skillID == 300 or skillID == 113 or skillID == 252 or skillID == 253) then
    local Sp = srcUser:GetProperty("Sp")
    SpAtk = Sp
  end
  local BaseAtk = Dex * 2 + math.floor(Dex * Dex / 100) + math.floor(Str / 5) + math.floor(Luk / 5)
  local AtkFinal = (((Atk - BaseAtk + NormalAtk + atk_add) * (1 + AtkPer) + SpAtk) * CommonFun.ShapeCorrection(srcUser, targetUser) * bodyparam * elementparam * elementparam2 + BaseAtk) * raceparam * bossparam * bossparam2
  local DefReduc = CommonFun.CalcDef(srcUser, targetUser)
  local targetid = targetUser:GetGuid()
  local distance = srcUser:GetDistance(targetid)
  local skilllv_1 = srcUser:GetLernedSkillLevel(133)
  local DisDam = 1
  if 10 < skilllv_1 then
    DisDam = 1 + distance / 7.5 * (skilllv_1 - 10) * 0.1
    if srcUser:HasBuffID(131080) or targetUser:IsBuffFrom(1007000, srcUser:GetGuid()) and srcUser:HasBuffID(1007050) then
      DisDam = 1 + (skilllv_1 - 10) * 0.1
    end
    DisDam = math.min(DisDam, 2)
  end
  local profressionID = srcUser:GetProfressionID()
  if srcUser:HasBuffID(56712) and (profressionID == 42 or profressionID == 43 or profressionID == 44 or profressionID == 45) then
    DisDam = DisDam + distance / 7.5 * 0.1
  end
  local Injured = 1
  if bits[CommonFun.AttrEffect.NormalSkillDam] == 1 then
    Injured = 1.3
  end
  local bafeng = 1
  local skilllv_1 = srcUser:GetLernedSkillLevel(5700)
  if targetUser:IsBuffFrom(1007000, srcUser:GetGuid()) then
    bafeng = 1 + skilllv_1 * 0.05
  end
  if skillID == 5304 then
    local skilllv_diyu = srcUser:GetLernedSkillLevel(5300)
    damChangePer = skilllv_diyu * 0.9 + 3.6
  end
  local A = (AtkFinal * DefReduc * (1 - DamReduc2) + Refine) * damChangePer * (1 - RefineDamReduc) * (1 + DamIncrease - LongRangeDamReduc2) - Vit2 * (1 + VitPer2)
  if skillID == 300 or skillID == 113 or skillID == 252 or skillID == 253 then
    local guid = srcUser:GetGuid()
    local Debuff_Layer_1 = targetUser:GetBuffLayerByIDAndFromID(96082, guid)
    local Debuff_Layer_2 = targetUser:GetBuffLayerByIDAndFromID(96083, guid)
    local sw_dam = math.max(Debuff_Layer_1, Debuff_Layer_2) * 0.06 + 1
    A = ((AtkFinal * DefReduc * (1 - DamReduc2) + Refine) * damChangePer * (1 - RefineDamReduc) * (1 + DamIncrease - LongRangeDamReduc2) - Vit2 * (1 + VitPer2)) * DisDam * Injured * sw_dam * bafeng
  end
  if skillID == 404 then
    local GemValue = srcUser:GetGemValue(41131)
    local skilllv_3 = srcUser:GetLernedSkillLevel(5703)
    if skilllv_3 == 0 then
      bafeng = 1
      DisDam = 1
      Injured = 1
    end
    local NormalAtkDam = srcUser:GetProperty("NormalAtkDam")
    local NormalAtkRes = targetUser:GetProperty("NormalAtkRes")
    local NormalEnd = 1 + NormalAtkDam - NormalAtkRes
    NormalEnd = math.max(NormalEnd, 0.1)
    A = ((AtkFinal * DefReduc * (1 - DamReduc2) + Refine) * damChangePer * (1 - RefineDamReduc) * (1 + DamIncrease - LongRangeDamReduc2) * (1 + GemValue / 100000) - Vit2 * (1 + VitPer2)) * bafeng * (1 + skilllv_3 * 0.1) * DisDam * Injured * NormalEnd
    local CriDamPer = srcUser:GetProperty("CriDamPer")
    local CriDefPer2 = targetUser:GetProperty("CriDefPer")
    local GemRate = srcUser:GetGemValue(41132)
    local Rate = GemRate / 1000
    if srcUser:HasBuffID(90004254) and srcUser:HasBuffID(131080) then
      Rate = Rate + 30
    end
    if CommonFun.IsInRate(Rate, srcUser:GetRandom()) then
      A = (AtkFinal * (1 - DamReduc2) + Refine) * damChangePer * (1 - RefineDamReduc) * (1 + DamIncrease - LongRangeDamReduc2) * (1 + GemValue / 100000) - Vit2 * (1 + VitPer2)
      return A * (1.5 + CriDamPer - CriDefPer2), CommonFun.DamageType.Crit
    end
  end
  if A <= 1 then
    return 1
  end
  return A
end