Complex sentence: He threw himself into a study of the modern colloquial language Duus (1988: 770-2) and during this time, his maiden work was published, the book-length study "Lu Xun" (1944).
Split into simpler sentences: He threw himself into a study of the modern colloquial language Duus (1988: 770-2). During the time, his maiden work was published as "Lu Xun" (1944).