Toys, Games and Hobby Products Design Shangfang Large Seal Script Building Block by Zhong Huang Shangfang Large Seal Script is an educational building block set inspired by the ancient Chinese classic enlightened reading material The Book of Family Names which can be dated back to 1000 years ago, a toy joined by mortise and tenon. This technique has been handed down and developed for more than 7000 years till now. Immersing in the fun of building bricks, players are guided to admire the immense historical heritage and unique culture of China over the past thousand years.