Tired. Drivers of Yangzhou Jianhua Building Materials need to obey orders and run around at any time, which is rather tiring. However, they pay five insurances when they join the company, take a regular rest every week, provide accommodation and enjoy generous welfare benefits. Jianhua Building Materials Group (referred to as Jianhua Building Materials for short) is a comprehensive service provider of concrete products and technologies, a national housing industrialization base and a single champion demonstration enterprise. Founded in 1992, formerly Jianhua pipe pile.