Wailimen is a scenic spot listed on the World Heritage List in Okinawa, Japan. The so-called Wailimen is a memorial archway of the Tang Dynasty style in China. Because of its long construction time and the baptism of artillery fire in history, especially in World War II, it is very precious to survive. Inside the gatekeeper is the Royal Palace of the Ryukyu Kingdom. Apart from the winding walls along the mountains, the palace now seen is the Ryukyu Kingdom palace restored as it is. It is said that the Ryukyu Kingdom in history was a country without an army. The emperor accepted the seal of the Ming Dynasty. Today's Ryukyu Palace is basically restored to its original state. The Emperor's palace is located in the center of the palace, surrounded by the Emperor's office and dormitory. However, due to the long-term rule of Japan in modern history, the palace has a distinct Japanese architectural style. On both sides of the main palace are the South Palace and the North Palace. The South Hall receives Japanese envoys and the North Hall receives Chinese envoys. Nancheng restored many palaces at that time, while the North Palace displayed portraits of the emperors of the Ryukyu Kingdom and some cultural relics. Photographs are not allowed to enter the palace. Shoes need to be taken off when entering the main hall and the South hall. Shoes can be taken off when entering the North hall. It is said that this is done in accordance with the customs of Japan and China respectively. To Okinawa, this historic relic is worth visiting. The archways and the restored palaces tell you the true stories that have happened in history in silence. Let the visitors experience them carefully.