Zhang Han was a famous talent in the Western Jin Dynasty, and he was good at writing articles. He wrote that rapeseed flowers have "yellow flowers like scattered gold", which was praised by Li Bai: "Zhang Han's yellow flowers have been popular for five hundred years." In fact, it is what really makes him popular today.

What’s more: not falling in love with the high official and his salary, missing his hometown delicacy, water shield and seabass, resigning and going into seclusion.

He was praised by later generations for this. Ouyang Xun, one of the four famous regular script masters in China during the Sui and Tang Dynasties, admired Zhang Han's behavior and wrote a biography of Zhang Han "Zhang Han Si Yu Tie" (existing in the Palace Museum, Beijing). He used pen and ink to describe Zhang Han.

Not loving high position but loving hometown and its food is written into history and passed down to future generations.

Zhang Dachun, a scholar of the Qing Dynasty, said in his Qilu "Ode to the Tomb of the Eagle in the Passing Season": "...the eagle in the season is as high as the Eastern Wu...the generals were neglected during the lifetime of the cup of wine, but the water shields are heavy after the autumn wind. Now the snobbery is overwhelming, but in the past

Should I be ashamed of this? "In the first year of Tai'an, Emperor Hui of Jin Dynasty served as the Grand Sima Dongcao, in charge of the selection of officials and other matters. He was a high-ranking official with personnel power.

When he was in office, he saw Emperor Wu of Jin Sima Yan passing the throne to his mentally retarded son, which caused a power struggle and the "Eight Kings Rebellion" broke out.

He didn't want to be among them.

At this time, the autumn wind was blowing, so he chanted the famous "Song of Thinking about Wujiang": "The autumn wind blows, the leaves are flying, the water of Wujiang River is full of fat fish. I haven't returned home after three thousand miles, and I can't help but look up to the sky with sadness."

The Songjiang River mentioned by the predecessors, which is now the Wusong River (called "Suzhou River" in the urban area of ??Shanghai), originates from Guajingkou of Taihu Lake in Songling District of Wujiang River, and flows through Wujiang, Wuxian (now Wuzhong District), Kunshan, Jiading,

Qingpu, after entering the urban area of ??Shanghai, flows into the Huangpu River near the Waibaidu Bridge and is one of the estuaries of Taihu Lake. We can confirm this from Zhang Han's hometown and "Thinking of Wujiang Song" written in 909 AD (the third year of Kaiping in the Later Liang Dynasty).

) King Qian Liu of Wuyue requested that the northern border of Jiaxing be cut off and a county be established in the southern part of Wu County. Since Songling Town, the county government, has been under the jurisdiction of Wu County since it was established as a town in the Western Han Dynasty, and it is located in the upper reaches of the Songjiang River, the two merged, and the word "Song" was omitted.

"Wujiang" is the name of the county. And because Songjiang comes from the Songling Town area, sometimes Songjiang refers to Wujiang Songling. Naturally, Songjiang became another name for Wujiang. Therefore, in ancient times, Songjiang may refer to the current Wusongjiang River.

, may also refer to Wujiang, rather than Songjiang, which is now a suburb of Shanghai. Songjiang Prefecture was established in 1278 AD (the fifteenth year of the Yuan Dynasty). From then on, Wujiang was no longer called Songjiang, and Songjiang was no longer called Songjiang because it originated from Wu.

, it was renamed "Wusong River". Since ancient times, Songjiang four-gill bass has been famous all over the world.

", it has the reputation of "the first fish in the south of the Yangtze River". Songjiang bass was not uncommon in the past. In the 1950s, during the autumn flood season, the catch amount could reach 10,000 jin. Older people in Songjiang, Shanghai may have tasted four-gill

Perch. Perch is a migratory fish. Every spring, the young fish swim from the Yangtze River estuary to the inland river to grow and fatten. In autumn, when they become sexually mature, they swim to the junction of seawater and fresh water in the Yangtze River estuary to lay eggs and reproduce. The cycle begins again and again.

The construction of gates and dams destroyed the migration routes of bass; coupled with the increasing water pollution, it affected the living environment of bass. The production of bass in Songjiang became less and less. By the 1970s, it was basically impossible to catch bass.