1. The game will be available for payment within the next month or so, but the product cost will not be very high. 2. The fee does not affect players who have already downloaded the game. 3. In order to ensure that updates, new content, and bug fixes continue to be provided to the game, the author needs a steady stream of income from selling the game. 4. Through the charging model, more resources will be invested in game optimization and testing to ensure the stability and fluency of the game. 5. By charging, the author can better protect the copyright and intellectual property rights of the game, prevent piracy and illegal distribution, and ensure that the author's efforts are duly respected and rewarded. 6. I want to attract people who really love the game and are willing to invest in it. The paid model helps me better understand and meet the needs of my core players. It also provides some financial support for new projects that are being prepared. 7. This change is primarily for the long-term health and continued growth of the game, not purely for profit. For those who have already supported the free version, thank you.