孩子长得像你就完了
[hái zi zhăng dé xiàng nĭ jiù wán le]
This username humorously means 'It’s all over if the child looks like you'. It suggests that if the child looks exactly like you (likely referring to having inherited undesirable traits from parents), then it might create a lot of trouble or problems. It reflects the idea of someone joking about their worries regarding genetic inheritance.