In July, there will be a week's trip to Tianjin. Is it better to go to Qingdao, Shandong, or to the northeast and Dongdaihe?

I have been to both the places you mentioned. I suggest going to Qingdao, Weihai and Yantai, because Dongdaihe and Beidaihe are crowded and dirty, and the seafood is not so good. I went to Beidaihe and Dongdaihe every year in previous years. Later, I had the opportunity to go to Weihai, Yantai and Qingdao, and I have never been to Beidaihe. Maybe it doesn't matter if I don't like crowded places. Weihai is particularly recommended to take the expressway around the sea. As for eating seafood, not to mention, we bought it in the market and processed it in the hotel, and later bought a lot and brought it back to Beijing.