There are too many good brands of soy sauce and vinegar. I can only recommend two kinds to myself.

Soy sauce: I ate Kikkoman soy sauce. A bottle of 3 kg, brewed in Singapore factory, 35 yuan. Kikkoman is the largest soy sauce manufacturer in the world.

Note that Japanese soy sauce is light soy sauce without caramel color, that is, "clear sauce" or "light soy sauce". To make soy sauce for braised pork, you can try the old Beijing "Golden Lion".

Vinegar: I ate "Donghu" brand 8-year handmade vinegar produced by Shanxi Mature Vinegar Group. 3 kg 150 yuan.

For reference.