This document provides information on various bus seat models from Shenzhen Huayuanda Auto Parts Co., Ltd. It describes 9 different seat models for city buses and coaches, including standard, soft-type, new concept, spring hill, blow molding, lightweight aluminum, and urban city bus seats. Each model lists features and functions, comfort specifications, suitable vehicle types, structures, materials, color options, and optional configurations. The company provides ISO and other quality certifications and has patent protections on some of its seats.