Before revision: A sexual vampire practices the ancient Chinese sexual technique in which one partner is believed to replenish his or her own body by absorbing the other partner's qi ("life force") and its concentrate jing ("sexual energy") without emitting any of one's own.
After revision: A sexual vampire practiced esoteric Daoist sexual techniques where one partner purportedly strengthened their own body by absorbing the other partner's qi ("life force") and jing ("sexual energy") without emitting any of one's own.