1. The highest realm of calligraphy is "to suit both refined and popular tastes". "Suit both refined and popular tastes" means that both learned and knowledgeable literati and uneducated and uneducated laymen can get beautiful feelings when they appreciate calligraphy works, so it is called "suit both refined and popular tastes".
2. Elegance is "elegance" to the extreme, and vulgarity is "vulgarity". To achieve "calligraphy is recognized, appreciated and praised by everyone", we must also let Ba Liren get inner "shock" and applause. Only by "appealing to both refined and popular tastes" can we reach the highest level of calligraphy.