private string getDiShi(int zhiIndex)
{
int offset = CHANG_SHENG_OFFSET[getDayGan()];
int index = offset + (lunar.getDayGanIndexExact() % 2 == 0 ? zhiIndex : -zhiIndex);
if (index >= 12)
{
index -= 12;
}
if (index < 0)
{
index += 12;
}
return(CHANG_SHENG[index]);
}