In order to learn how to use them he had to look into all kinds of written materials on the subject, from home and abroad, and made an interesting discovery for himself about the different treatment these educational toys have received in China and the West.
有了「硬體」，為了懂它們的玩法，張世宗遍尋古今中外的相關書籍、資料，得到一個小小結論：這些益智童玩在中西之間受到的待遇極不平等。