I envy the Australian people very much. The air is so good. There is such a big botanical garden in almost the city center. It is much larger than Shanghai Botanical Garden. It is also rich in species and free of charge. It is divided into different areas according to different plant species. Every time I visit the botanical garden, I am glad to know all kinds of plants, but I can hardly remember them. But that's all right. Every time I see them, I have a good sense of freshness. Illiterate people love the natural landscape!