I highly recommend this journey. In the morning, a driver will greet you at the hotel and go to a meeting point in the city center to meet up with other fellow travelers. On the way, the tour guide gave professional explanations, and his Chinese was very clear and kind. Go to different attractions, and take the initiative to take pictures for us! The journey includes access to the third tunnel, but unfortunately it is not possible to take pictures in the tunnel. The mobile phone camera must be stored in the passenger center before departure, so relevant regulations will be respected. But it’s a great honor to feel the local history. Finally returned to Seoul and took us to a famous restaurant for lunch before disbanding!