When Pilsudski is mentioned in Chinese books, Pilsudski is a reactionary dictator, a military fascist leader, who ruled Poland without granting people freedom...
But Pilsudski also fought for Polish independence?
What do Polish people really think of him, do you hate him for his dictatorship or praise him for his patriotic efforts?
He is not hated for sure (at least by the majority of Poles, I think) but also the assessment of Piłsudski isn't unambiguous.
I think the article in Wikipedia sums it up well:
For a decade after World War II, Piłsudski was either ignored or condemned by Poland's communist government, along with the entire interwar Second Polish Republic. This began to change, however, particularly after de-Stalinization and the Polish October (1956), and historiography in Poland gradually moved away from a purely negative view of Piłsudski toward a more balanced and neutral assessment.
After the fall of communism and the 1991 disintegration of the Soviet Union, Piłsudski once again came to be publicly acknowledged as a Polish national hero. On the sixtieth anniversary of his death, on 12 May 1995, Poland's Sejm adopted a resolution: "Józef Piłsudski will remain, in our nation's memory, the founder of its independence and the victorious leader who fended off a foreign assault that threatened the whole of Europe and its civilization. Józef Piłsudski served his country well and has entered our history forever."
While some of Piłsudski's political moves remain controversial — particularly the May 1926 Coup d'état, the Brest trials (1931–32), the 1934 establishment of the Bereza Kartuska detention camp, and successive Polish governments' failure to formulate consistent, constructive policies toward the national minorities — Piłsudski continues to be viewed by most Poles as a providential figure in the country's 20th-century history.
In Poland Piłsudski is also:
Widely recognized for his opposition to the National Democrats antisemitic policies, he extended his policy of "state-assimilation" to Polish Jews. The years 1926–35, and Piłsudski himself, were favorably viewed by many Polish Jews whose situation improved especially under Piłsudski-appointed Prime Minister Kazimierz Bartel. Many Jews saw Piłsudski as their only hope for restraining antisemitic currents in Poland and for maintaining public order; he was seen as a guarantor of stability and a friend of the Jewish people, who voted for him and actively participated in his political bloc. Piłsudski's death in 1935 brought a deterioration in the quality of life of Poland's Jews.
Quotes from: https://en.wikipedia.org/wiki/J%C3%B3zef_Pi%C5%82sudski
Hitler considered Pilsudski as a great lider
That's definitely not the best recommendation in the world lol
Far from it
Really? He is rather infamous for the prison for political prisoners at Bereza Kartuska and his authoritarian methods.
did the Polish ever think of reuniting Ukraine, Belarus and Lithuvania like they did so in the medieval commonwealth?
I think probably during at least one of the uprisings (during the partitions) and you could also read about:https://en.wikipedia.org/wiki/Polish-Soviet_War