going on a business trip to guangzhou and tianjin. which is better to spend the weekend?

Well, it's suggested to go to Guangzhou.
Compared with Tianjin, Guangzhou has more popular scenic areas, such as the Pearl River, Sun Yat-sen Memorial Hall and White Cloud Mountain.
At the same time, you can also taste many delicious local snacks there. Have fun!

I recommend Tianjin to you. For the weekend, you can enjoy yourself at the Italian Style Street, Ancient Cultural Street and the Eye of Tianjin. For dining, the local Nanshi Food Street is the best choice. I worked there for a year. I am sure you will love the city.