As recorded at collection: Earn model usage credits through the Hei Yu Bai (黑与白) game

Hei Yu Bai (黑与白) is a free, open site that offers a variety of large language models. A user review says that you can collect credits by playing games on the benefits site and use them to access models.

There are cases of new users obtaining an invite code to access the site, but no instructions on how to get a code were provided. To start drawing cards, go to `Card Exchange → Draw Center → Draw Records` and check your number of draws and the number of cards obtained. Use these records to calculate your card acquisition probability, then compare the estimated cost of collecting one set of 6 orange cards with the reward table. Keep drawing if the set reward exceeds the cost, and stop if it is lower. A calculation page that shows the set cost and profit range when you enter the number of draws and cards is also mentioned, but no actual link is included.

If cards have been exchanged, the card catalog may include gifted cards in its count, making the probabilities inaccurate, so draw records should be used for calculations. For the usual 650 draws and the commemorative event’s 1080 draws, the difference in the share of free draws, 50 and 80 respectively, has almost no effect on cost estimates. Once you reach a stage where rewards decrease, exchange rewards gradually decline, and continuing to draw after the reward becomes less than the set cost results in a loss. The 90-day cumulative calculation should be treated as entertainment only, and no separate deadline was announced.