Baiyun Mountain is relatively large in these places you want to visit. It takes more than an hour from downtown and at least half a day to play, unless you go up and down the mountain by car, but that is boring. You are in a hurry, so I suggest removing it.
On the first day, I visited Shangxiajiu (subway to Changshou Road Station) in the afternoon, ate authentic Guangzhou snacks, and then went to Shamian (subway Huangsha Station), where the night view was good. If you are interested, you can also take a boat trip to the Pearl River at night. It is recommended to live near the subway station, and it is convenient to travel the next day.
The next morning, I went to the Sacred Heart Church in Shishi (subway Yide Road Station), and then I took the subway to Guang Zhouta, where I took a short ride. There is a tram nearby, and I can take a ride if I have time. In the afternoon, take apm at Guangzhou Tower Station to visit flower city square, and there is the Guangdong Provincial Museum to visit.
If you are a donkey friend, you can go to the beehive to see if anyone happened to be traveling with you these two days, or met by the roadside.