The real questions of the provincial competitions over the years
Difficulty ratings for each question based on my experience can be used as a reference.
(Difficulty: ★) = Focus on Participation
(Difficulty: ★★) = Provincial Third Prize
(Difficulty: ★★★) = Provincial Second Prize
(Difficulty: ★★★★) = Provincial First Prize
(Difficulty: ★★ ★★★) = big guys play together