Complex sentence: Their editor-in-chief, Mr. Ng Kee Siong (黄基松), began his career at the "Chinese Commercial Paper" in 1942 at the age of 25; after 18 years there, the paper was forced to shut down.
Split into simpler sentences: Their editor-in-chief, Mr. Ng Kee Siong (黄基松), began his career at the "Chinese Commercial Paper". In 1942, at the age of 25, after 18 years there, the paper was forced to shut down.