Five-star review! Thank you, Director Li, for your dedication, patience, and thorough explanations. We were originally scheduled to board at 8:00 AM from Lao She Teahouse near Qianmen, but considering it was too early, the subway transfer would be necessary, and the walking would take time, I considered getting a refund. Director Li learned that I was taking Metro Line 8 from Muxiyuan and directed me to the Beitucheng station, allowing us to meet at 8:50 AM. Following Director Li's directions, I boarded the bus at Beitucheng. Today's Great Wall visit went very smoothly and I thoroughly enjoyed it. Thank you, Director Li!