Title: Inside North China’s Largest Semi-Trailer Manufacturing Hub: A Look at  Yuanda’s $150M Investment  Located in Shijiazhuang, Hebei, Yuanda Intelligent Manufacturing is a heavy-duty  industry leader with a total investment of **$150 million**. Our facility spans **239 acres** with a construction area of **159,900 m²**, making us one of the largest semi-trailer R&D and manufacturing bases in North China. As a **genuine source factory**, we offer 80,000 m ² of production space and an 8,000 m ² R&D center. Whether you need standardized flatbeds or highly customized tippers, we provide competitive factory-direct pricing, punctual delivery, and comprehensive after-sales support.