Generally, the sweet noodle sauce in Shandong and Beijing is salty and strong, while the sauce in Sichuan and South China is weak. I don't know what you are going to cook. If you are a Zhajiang Noodles in Beijing, you have to use Liubiju sweet noodle sauce made in Beijing to eat roast duck with roast duck sauce. If you eat other sauces, it is better to choose Shandong onion companion sweet noodle sauce or sweet noodle sauce from southern China.