According to legend, during the Three Kingdoms period, Kangju, the prime minister of the Western Regions, had an eldest son named Hui. He doesn't love wealth, he sees through the world of mortals, and he is determined to become a monk, so he is called "Kang Sanghui". Adhering to the teachings of Buddhism, Kang Sanghui came to China to spread Buddhism, make a good relationship, and crossed to Shanghai and Suzhou. One day, when I came to Longhua Dang, I saw that the water and the sky were all the same and the dust was spotless. I think this is a treasure house of practice, and I live here. He doesn't know that the scenery here is quiet and extraordinary because the Guangze Dragon King built the Dragon Palace here. Wang Long was very unhappy when he saw a monk living there. At that time, I had evil thoughts and wanted to make waves, overthrow the monk's thatched cottage and scare the monk away. However, the Dragon King suddenly found a ray of light in the thatched cottage with colorful auspicious clouds on it. The dragon king was taken aback. Take a closer look, and when you see monk Kang, you will look carefully.
Play hymns. After listening for a while, the Dragon King was moved by the Buddhist information recited by the monk. He not only dispelled his original evil thoughts, but also ran to the monk's meeting and said, I am willing to go back to the East China Sea and give the Dragon Palace to the monk's meeting to build a Buddhist temple. After accepting the kindness of the Dragon King, Kang Sanghui converted the Dragon Palace into Longhua Temple, and made a special trip to Nanjing to meet Sun Quan, the monarch of the State of Wu, and asked him to help build the stupa in order to arrange the relics he invited. In this way, Longhua Temple built 13 stupas and placed 13 relics.
It is said that this "Kang Senhui" also did something that had a far-reaching impact on Shanghai and even the surrounding areas, that is, he once set up a "Hushengtang" near Longhua Temple to teach the sugar-making methods handed down from India to benefit the local people.