Calligraphy, as an art form, has certain cultural and artistic value. In Thailand, calligraphy is also highly valued, and many people appreciate and are willing to buy calligraphy works as decoration and collection. These calligraphy works are written by well-known calligraphers and have unique artistic style and skills, so they have high market value.
The price of calligraphy works is also affected by the relationship between supply and demand in the market. If the market is in short supply, the price of calligraphy works will increase accordingly. Therefore, the calligraphy of 600 yuan in Thailand can be sold because it has certain cultural and artistic value and is recognized and demanded by the market.