Why is Chengdu called Rongcheng?

Chengdu, as a city, has never moved its site, which is a miracle in the history of world cities. The ancient Chengdu has won many praises in its development. In the Eastern Han Dynasty (AD 25-220), because the brocade was developed, a special organization "Jinguan" was set up to manage it, so it was called "Jinguan City" (referred to as "Jincheng"). At the end of the Western Han Dynasty (AD 8), Chengdu, Luoyang, Handan, Linzi and Wancheng became one of the five major commercial cities in China. After the Five Dynasties, the Emperor of Shu (933-965 AD) planted hibiscus all over the city wall, so it was also called "Furong City" (abbreviated as "Rongcheng"). In the Song Dynasty (AD 960- 1279), because the comprehensive economic level was among the best in the country, people at that time had the evaluation of "prospering one and benefiting two", which was just as famous as Yangzhou, which had the advantages of shipping and trading ports. Chengdu has been known as the land of abundance since Li Bing, the magistrate of Qin and Shu, presided over the construction of the world-famous Dujiangyan water conservancy project more than 2000 years ago.