In mid-April 2015, the general manager of Qingdao Liyang Rubber Technology led the technical team to visit Iran's BAREZ tires, KAVIR tires, IRAN tires and other tire companies, exchanged high-performance TBR and PCR tire technologies, and discussed the current tire industrialization Development. It also signed a five-year technical cooperation agreement with Iran’s largest tire company BAREZ tires. Liyang Rubber Technology will jointly develop high-performance green tires with BAREZ tires and assist BAREZ tires to continue to lead the Iranian market.