going to Baoding or Tangshan on National Day depends on what kind of tourist destination and activities you prefer. Here are some information about Baoding and Tangshan, which can help you make a decision:

Baoding:

- Baoding is located in Hebei Province, a city with a long history and many ancient buildings and cultural attractions.

- You can visit places of interest in Baoding, such as Zhangshiyan in Quyang County and Donghu in Laiyuan County.

- Baoding also has some modern tourist attractions, such as Baoding Zoo and Ski Resort.

- Baoding's food is also very distinctive. You can try local Baoding hotpot, Mancheng roast chicken and other delicacies.

Tangshan:

- Tangshan is also located in Hebei Province. It is an industrial city with many natural attractions and cultural landscapes.

- Tangshan has beautiful seaside scenery. You can enjoy the beautiful sea in the seaside park and Tahe Bay in Tangshan city.

- Tangshan also has some famous tourist attractions, such as the ancient Great Wall in Fengnan District and the Kailuan Museum in Fengrun District.

- The food in Tangshan is mainly seafood. You can try local seafood dinners, barbecues and other delicacies.

to sum up, if you are more interested in history, culture and historic sites, Baoding may be a good choice. If you like seaside scenery and seafood, Tangshan may be more suitable for you. You can decide which city to go to according to your hobbies.