How to improve the sunshine value of Hua Teng in QQ space?

Give yourself some sunshine every day. The sunshine value of yellow brick will be higher, so let a friend help you. When you help others, your sunshine value will increase. Replace the fruit in the treasure chest with "chemical fertilizer", and then fertilize your Hua Teng with chemical fertilizer, which can increase the yield. Let your friends enter your space more and add a little for everyone until it is full.