She tricks Wei Qing into following her outside of the city, where her father, a very high ranking person from the Heavenly Cult was waiting in ambush. IIRC her father is a Life and Evil Heavenly Jewel Master, a 9 Jewel at that. The two of them had plotted this to recruit Wei Qing into the Heavenly Cult, as the Devour skill Wei Qing had is the best skill an Evil bead can have, which signifies the Jewel Master having the purest/strongest type of Evil element. The only precedence was the creator of the Heavenly Cult, who basically brought the Heavenly Cult into their current position as one of the 5 Holy Shrines. However, as time went by, the blood started getting thinner, causing the main power of the Heavenly Cult, the Evil Element, to slowly reduce, so most of the Cult members couldn't even do a Demon Change, which was the technique which gave the status of Holy Shrine to the Cult. To get rid of this crisis, the Cult requires either a Jewel Master with very pure Evil element (Zhou Wei Qing since he basically fuses with the black bead)or one of their direct descendant (so Zhou Wei Qing's only job will be to make kids, he wouldn't even need to improve his skill TBH if he chose this route), which could be solved by getting Zhou Wei Qing in their hands. Since Wei Qing didn't want to join, but due to the high position Ming Hua's father held in the Feili empire, they wouldn't let him go, even when he swore to never tell anyone about Ming Hua and her family's allegiance to the Heavenly Cult. So the father and Wei Qing make a bet on whether Wei Qing can survive for an allocated time against the father (or was it limited power, can't remember), and Wei Qing will join the Cult if he loses, while the fahter/daughter combo will let him leave unharmed if he wins. Wei Qing wins by holding out until the allocated time runs out, but the father breaks his promise, even though he feels deeply ashamed, the potential the father saw in Wei Qing made him ignore everything and try to brand him as a Heavenly Cult member. When Wei Qing is knocked out, and about to get him branded, when the tirgress appeared and shooed the father off. After this happens, the Heavenly Cult just decides to keep themselves on good terms with Wei Qing, so Ming Hua ends up as a hench(wo)man to Wei Qing, as she ends up listening to nearly anything Wei Qing says.
Spoiler for Interesting part after the Heavenly Cult's order:
After Ming Hua was ordered to obey Wei Qing, the princess appears and asks Ming Hua where her brother is (the one she was flirting with), and gets rebuffed quite coldly (Ming Hua basically sees her as an idiot here) since it appears that the princess was already warned to not get close to him anymore. Bing Er enters, apparently princess and Bing Er were quite close friends, but when Bing Er mentions how she followed Wei Qing to the school, the princess tells Bing Er to never get close to him, and insults him. IIRC, she also talks about Wei Qing's 'girlfriend' about how stupid that girl is, and further insults Wei Qing, and declares that she only likes great people, but will never like Wei Qing no matter how great he becomes, not that he will become someone great anyway. This completely angers Bing Er, who then announces to the princess that she is the 'wife', and that she isn't fit for Wei Qing, followed by an telling the princess that their friendship is over. At the same time, when Ming Hua heard the princess say Wei Qing being useless, and scorning him, she is so shocked at what she says as the princess is just too stupid+ignorant.
Spoiler for Further interesting things (About Ming Hua's brother):
The reason Ming Hua's brother is in the Feili Empire, despite his commanding abilities being repressed so much from the higher ups (politics+jealousy can be pretty annoying) was due to his lover being there, who was shown to be the Dean of the academy and the Princess of the Feili Empire. She is apparently privy to the fact that Ming Hua's whole family is from the Heavenly Cult, and the reason for the brother's constant attempt to rise in position (which is weird as people from the Holy Shrines honestly don't care about power in the secular world) was simply to be able to marry the Princess. However, the Empire is just too stupid and useless, that he wants to give up, since the Princess of the Empire can't even give him proper support, so he couldn't even feel the slightest bit of affection from her, despite giving her everything he had, and even giving her information which would lead him to his death (him coming from the Heavenly Cult). She does like him, but acts too slowly, and always just says that she is powerless, so the brother just throws away his position, takes the men who are loyal to him, not the Empire and goes off to accept Wei Qing's invitation to become his commander for the army. Basically, Princess of the Heavenly Bow Empire has been trying to go out with the lover of the Princess of the Feili Empire and the Dean of her school, pretty stupid of her.
Think I pretty much said everything related to her in the story, she only appears in the School Arc and the Retaking of the Sky Bow Empire Arc, she never appeared in any other arc, other then the ones translated.
I just finished reading it, jeebus the level of YY goes through the roof in the last third, I thought I was reading LLS.
Fairly typical of Tang San, the power system is interesting and it's livelier than most, but we get the obligatory pointless tournament arc. And then the second tournament arc while they're in the middle of a war. <_<