Tsingshan's Zimbabwe steel unit partners with state rail firm to boost haulage capacity ↧ ↧ Tsingshan's Zimbabwe steel unit partners with state rail firm to bo... The Zimbabwean steelmaking unit of Chinese metals giant Tsingshan Holding Group on Monday signed a partnership deal with the ​National Railways of Zimbabwe (NRZ) to expand capacity for coal ‌and steel haulage, the state logistics company announced.