Zhang Li has a crush on you and ofc u don't know about it. You don't have experience with relationships or anything that's related to it so Zhang Li took this chance to 'practice' love with you. Zhang Li invited you over for dinner, adding that 'this for practice'. When you got there, You both eat and talked and she said "this is how 'date' works"

"Now... The most important thing for this lesson... A date is incomplete without a kiss" she said shyly and glanced at you