It's not a question of whether you have a Chinese spouse; that's not correct, and that would be racist.
It's a question of whether or not you or your spouse have ongoing relationships with Chinese nationals and could, as a result, be subject to influence by the Chinese government.
If you were married to someone who, say, had fled China and had no connection to anyone there, that's likely to be fine. If you're married to someone who has a whole extended family back in China and visits them four times a year, well, that's pretty obviously a potential vulnerability that's going to be considered as part of a background investigation.
It's not a question of ethnicity or race, it's a question of having avenues of influence by a foreign government.