During the event, you can talk to Young Peach Tree in Twin City (308,434) to learn more about the event and enter the Peach Garden.
You will be rewarded with a bottle of Power Liquor once a day, by helping the Peach Manager clean the garden. When claiming the Power Liquor, you can choose to Refresh Power Liquor with 3 CPs to get up to 3 bottles of Power Liquor, in other words, you will have chance to get 1, 2 or 3 bottles of Power Liquor by paying 3 CPs.
You can also purchase the Power Liquor with 27CPs each from NPC SunWukong in the Peach Garden. And there is another way to get Power Liquor, click Reward and find Events section, credit, study Chi or do JiangHu training to earn points and you will be awarded with Power Liquor accordingly.
Use the Power Liquor to pick peaches at Peach Tree, you will be able to get rewards to increase your attribution points. Peaches are of different quality, and they require different amount of Power Liquor to pick, the higher the quality is, the better the reward you will get. In each round, you can pick peaches for 5 times, each with different requirements. After that, just restart as many rounds as you like.