This question pertains to the climate of various global regions.

Option 1 suggests that equatorial regions have four main seasons, which is incorrect. Equatorial regions typically have two seasons - a wet and a dry season.

Option 2 suggests that Mediterranean regions receive more rain in the summer. This is incorrect as Mediterranean climate is characterized by dry summers and wet winters.

Option 3 suggests that in a China type climate, rainfall occurs throughout the year. This is correct. Described as humid subtropical climate, regions with this climate, like southern China, experience rainfall all year round.

Option 4 suggests that tropical highlands exhibit the vertical zonation of different climates. This is also correct as the climate in tropical highlands does change with altitude, leading to different climate zones vertically.

Therefore, the correct answer is option 4 - statements 3 and 4 are accurate.