public TUpgrade(string itemCode, string itemName, Texture2D itemIcon, int ct, int _tier, string _target, int _playerLv, int _reqLv, int _maxLv, string itemComment, int starRate)
: base(itemCode, TYPE.UPGRADE, itemName, itemIcon, ct, 0, itemTakeoffable: false, SLOT.NONE,itemComment,null,itemDiscomposable: false,string.Empty,-1,UPGRADE_CATEGORY.NONE,basic: false,starRate)
{
tier = _tier;
target = _target;
playerLv = _playerLv;
reqLv = _reqLv;
maxLv = _maxLv;
targetType = TItem.String2UpgradeType(target);
IsAmount = true;
}