Hanzi code for interchange

例句：

1. 1.The Hanzi code was used to encode messages during ancient times.
   古代使用汉字编码来加密信息。
2. 2. In modern times, the Hanzi code is still used in some areas for data storage and transmission.
   现代仍然有地区使用汉字编码进行数据存储和传输。
3. 3.The Hanzi code has been a subject of study for centuries due to its unique characteristics.
   由于其独特的特性，汉字编码一直是研究了几个世纪的主题。