What exactly is Gaozhou Changlian?

There is a couplet in the main hall of Sendai Temple, with a total of 236 words, which is called the first couplet in Guangdong.

Couplets are as follows:

A monarch, Xiongzhou is independent, and the department leads a hundred Guangdong positions. Looking back at that year, I acted resolutely, assisted Liang Dynasty, Chen Shi and Kuang Sui, and often taught my descendants: I served three generations of masters, but I was kind-hearted. I'm loyal to the liver, righteous and courageous, and the atmosphere is swept away by heaven and earth. Please sweat hard, I have seen Zhong Ding before.

Wanjiaxiang fire, solemn golden statue, the temple enjoys a thousand years of blood food. Up to now, he has been brilliant and powerful, saving the world, protecting the country and people's livelihood, and has repeatedly presented the emperor's letters: giving Jia Naipi a meritorious service and sealing Mrs. Ertai. Often steamed in spring and summer, the official orders worship stone carvings, quietly pass on mountains and seas and think about leisure, and reminisce about Yuan Zong.

A monarch, Xiongzhou is independent, and the department leads a hundred Guangdong positions. Looking back at that year, I acted resolutely, assisted Liang Dynasty, Chen Shi and Kuang Sui, and often taught my descendants: I served three generations of masters, but I was kind-hearted. I'm loyal to the liver, righteous and courageous, and the atmosphere is swept away by heaven and earth. Please sweat hard, I have seen Zhong Ding before.

Wanjiaxiang fire, solemn golden statue, the temple enjoys a thousand years of blood food. Up to now, he has been brilliant and powerful, saving the world, protecting the country and people's livelihood, and has repeatedly presented the emperor's letters: giving Jia Naipi a meritorious service and sealing Mrs. Ertai. Often steamed in spring and summer, the official orders worship stone carvings, quietly pass on mountains and seas and think about leisure, and reminisce about Yuan Zong.