A vertical sheet of four connected postage stamps in Neo-Chinese ink wash painting style, depicting spring, summer, autumn, and winter seasons. Each stamp features classic perforated edges, independent design while maintaining cohesive series aesthetic. Clean white margins surround the entire sheet, with ¥1.20 denomination printed on each stamp. Tranquil, serene, zen-like dreamy mood with gentle seasonal transitions through subtle ink gradients. Highly artistic masterpiece quality, official commemorative stamp series standard, ample negative white space, elegant refinement.