Visa on arrival in Hainan (HKA or SYX airports) for citizen of Poland

Hello,
I am Polish, currently in South Korea, planning 4-5 days trip to Hainan, and returning to Seoul. I hold no valid entry permit for China, and won't be able to obtain any on time.
I browsed many pages, but i'm still confused if i am eligible for applying for a short-term entry to Hainan only. Poland is NOT one of 21 or 26 countries subject to entry permit-waiver program, but i'm not seeking entry, but rather entry permit with a fee upon arrival. None of the sources specify detailed info/requirements, not even hainan government website. They usually refer "Citizens from countries and regions with established diplomatic relations or official trade relations with PRC", AFAIK Poland has such relations.
Also pls note, I am planning individual trip i.e. NOT with a 5+ group or "officially registered" agency.
Thanks in advance for your advice.
Pawel