Complex sentence: From 5001 to 5060 is based on class 2030, they use GTO-based VVVF control, from 5061 they use IGBT instead of GTO.
Split into simpler sentences: From 5001 to 5060 is based on class 2030, they use GTO-based VVVF control. From 5061 they use IGBT instead of GTO.