Professor Gu embarks on his journey back to his home country, encountering a passenger who forcibly takes his seat and disregards valid boarding documents. The relevant staff remain calm, verify the information according to regulations, preserve records, and handle the matter properly through established procedures. Back home, the authorities quickly coordinate resources to ensure the safe return of scientific researchers who have dedicated themselves to the country. Upholding rules, respecting those who make sacrifices, cherishing the nation, and working together to protect every person contributing to its development.