Complex sentence: In 1958-1959 the first 6 x 6 CA-30 lorries for the People's Republic of China army were introduced by Jiefang, and in 1973 the firm designed and produced a massive 60 Ton dump truck named the CA-390.
Split into simpler sentences: In 1958-1959 the first 6 x 6 CA-30 lorries for the People's Republic of China army were introduced by Jiefang. Later in 1973 the firm designed and produced a massive 60 Ton dump truck named the CA-390.