The world’s first set of gold/silver letters on the subject of traditional Chinese philosophy has high collection value and historical significance. Each collection is imprinted with a unique number, the same as its identification certificate code. This makes the collection more unique. On the front side of Tao Te Ching letters, It shows classic statements from original works via sandblasting and mirror finishing technique. On its reverse side, the theme patterns of Laozi going west and discussing philosophies along the Yellow River road, reflects the gist of the collection.