In the process of designing "OAS/S-ECHO", we still reflect the dialogue between "ancient and future". The overall shape is full of futuristic and technological sense, while the ancient elements symbolize our admiration for the past and respect for nature. The device combines modern environmentally friendly materials and technologies to create a device that not only reflects the forefront of technology but also is full of natural charm. The shape of the device is combined with its natural environment to show the interweaving of time and space. OAS/S looks like a mountain and a valley from the front and back. Through its unique design and the fusion of the environment, it conveys the eternity of nature and human vision of the future. Mountains and valleys symbolize the power and magnificence of nature, and are also witnesses of time, recording the historical changes of the earth. Based on the shape of mountains and valleys, combined with modern environmentally friendly materials and technologies, we created a device that reflects the natural beauty of the valley.