Will joining the university have an impact on future immigration or working in a foreign company?

Then I still suggest that you don't fill in party member identity. On the one hand, it has no positive effect on your immigration. On the other hand, although it is not negative, when the immigration officer or goes through the formalities, others will respond and ask about your "party member" status, which means that your procedures or processes will be affected a little.

Caring about party member's identity is mainly about the attitude and behavior of your country, such as whether you will be a "business spy" or an undercover (I believe the question you are asking here will not be these people ...), or whether you will do things that harm the interests of others for your own political party?

Excluding the above political factors, as long as you pass the test, the other party will not mind your joining the party too much.

Of course, if you are really worried, don't fill in the political outlook, just write "the masses".