Question

something China and Japan have in common is

they borrowed and adapted Western ideas.
they remained true to their cultural traditions.
they industrialized to improve their economies.
they have a history of strong cultural traditions.

Answer 1

I'm pretty sure the answer is: They have a history of strong cultural traditions.
I hope this helps

Answer 2

The answer is: They have a history of strong cultural traditions.

Historically, both people from China and Japan were really proud with their own original culture/traditions. This made them adopted policy of isolationism until mid 1900s. They did not like if foreign influence come to their country and started to influence the original culture/traditions that created by their ancestors.