Personally, I like Guangzhou, a city with a strong cultural and historical background. If you recommend it personally, refer to past trips to plan your itinerary, and you can punch in the following attractions.
Yuexiu Line: Sun Yat-sen Memorial Hall, Yuexiu Park, Nanyue King Museum of Western Han Dynasty.
Line: Shangxiajiu Pedestrian Street, Chenjiaci and Liwan Park.
Haizhu Line: Guangdong Provincial Museum, Haixinsha, Guang Zhouta and Sun Yat-sen University.