As soon as Ms. Lin got home, she saw Mr. Gu carefully studying various terrain and transportation maps with a magnifying glass.
"What's so interesting about the map?" Ms. Lin put her head over in confusion.
Mr. Gu put his arms around her waist, brought her into his arms, and kissed her forehead, "I was looking at how far apart we were at that time, and what roads I had to take to meet you."
Ms. Lin was delighted, "Then what are you going to do when you meet me?"
Mr. Gu rubbed her head and said, "How about I promise you this forever?"