Complex sentence: She argued that women should emancipate themselves of oppression through education rather than making themselves subservient, that by retaining their small bound feet would mean women imprisoning themselves indoors, and that they should develop new mental and physical qualities for the new era.
Split into simpler sentences: She argued that women, by retaining their small bound feet, made themselves subservient as it would mean women imprisoning themselves indoors. She believed that women should emancipate themselves from oppression, that girls can ensure their independence through education, and that they should develop new mental and physical qualities fitting for the new era.