Pay 1 yuan to purchase 1 participation chance, get 1 "Cloud Purchase Code"
When an item reaches its total required participants, 1 lucky winner is drawn.
Each item is divided into "shares" based on market price, priced at 1 yuan per share. Each share corresponds to one Cloud Purchase Code.
You can purchase multiple shares for the same item in one go.
When all shares of an item are sold, the "Lucky Cloud Purchase Code" is calculated. The holder of this code wins the item.
Take the 100 most recent purchase timestamps across all website items before the last purchase time of this item (For time-limited items, use timestamps before the deadline).
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Sum these 100 timestamps, divide by the total required participants for the item, take the remainder. Add 10,000,001 to the remainder to get the "Lucky Cloud Purchase Code".