1. Cultural value: Calligraphy is an important part of China traditional culture, and Rong Tie's calligraphy works bear rich cultural connotations and have high cultural value.
2. Historical value: Rong Tie's calligraphy works have witnessed the development of contemporary calligraphy art and have certain historical value.
3. Scarcity: Rongtie's calligraphy works are limited. As time goes on, his works may become more and more scarce, thus improving the collection value.