It only took Meng Jing and Lu Weiyan three years from realizing they were in love, to getting married, to getting divorced.
Lu Weiyan didn't understand Meng Jing's insistence on divorce.
Meng Jing felt that everything moved too fast between her and Lu Weiyan, and problems arose before she could figure out how to deal with them. If we can't solve it, let's separate, she thought.