What are you, a kid?
As a man who wanted to have a great-grandchild, Lu Qian was happy to see Little Melon. He was his grandson's child after all.
At first, when Lu Qian learned that his grandson, Lu Yifeng married someone else other than Bai Xiu Ying, he got angry at him. He was about to summon Lu Yifeng and ask him about this but he decided to look at the background of the girl he married first. He needed to find something against her so that he could make Lu Yifeng divorce her.
He saw in the news that Lu Yifeng and Xia Meilin was married for four years. Obviously, Lu Qian didn't believe that. If Lu Yifeng married a woman for that long, he should have found it out already.
Lu Qian found out the real relationship between Lu Yifeng and Xia Meilin. They just shared one night with each other and because of that, Little Melon was made.