Complex sentence: Diligent Work-Frugal Study Movement was a series of work-study programs which brought Chinese students to France and Belgium to work in factories as a way to pay for their study of French culture and Western science.
Split into simpler sentences: Diligent Work-Frugal Study Movement was a series of work-study programs which brought Chinese students to France and Belgium. The students worked in factories to pay for their study of French culture and Western science.