You should contact the Consulate of the People's Republic of China in Warsaw to consider your case on a case-by-case basis. Perhaps you will meet and make a positive decision. By analogy with Russia, I can say that it is impossible to issue a visa to China for a foreign citizen staying on the territory of the Russian Federation on a short-term visa. Also I remind you that you can stay in the central cities of China: Beijing, Shanghai or Guangzhou to 72 hours without a visa.