The 180-day limit means that you can get the corresponding digital currency every day within 180 days after purchasing the mining power product. The amount you get depends on the output of the total mining pool and the ratio of the purchased mining power in the total mining pool. After 180 days, you will no longer get the digital currency.
At present, we only provide 180-day mining power products. In the future, more mining power products of various periods will be delivered.