What is the longest couplet in China?

This pair of couplets may really be the first long couplet in the world (350 words) ... The first pair of couplets: climbing the stairs, it is said that the fee came, and it was said that Lu Shao came first, but Chu Shu failed to pass the exam. How can it be said that it was copied from which dynasty? Strive to climb mountains away from poverty and congestion, and people who feel at home are on a platform. Only Mi Heng wrote a poem and Cui Hao wrote a poem, which will be handed down forever. Wandering behind the official track, choosing victory depends on the face, connecting Anhui and Henan in the east, Jingxiang in the west, Changyue in the south, and resting in the north. In the vast universe, Hu goes to a stranger. Hang up the eaves, listen to a few times, hang up the sails, play with the snow waves and clouds, and get out of the top of the hundred feet. The towering Pinclay and Liang Dong regained their pride in the gorge, thanks to the efforts of the public. The immortal Xiongnu is an illusion. Xi will wear a sword on his shoulder, drink money in the bushes, play the flute on the ridge and have a crane shadow in the air. The second part: Pan Feng supports Jiege. It is said that Xin Qiji began in the furnace, which means that Bao Ming spread far and Jin history was lacking in doubt. who did you hear that from？ I admired the early emperor from the battle base and thought of many characters in those days, but Yunxiong left behind Sao and Ze, which will always be bright. The rest robbed the king of the map, saying that Wei was at that time, Ren Cheng destroyed the yellow string, Zhuang Yan drove wide, * * * practiced hard, and zhanghua's spirit was heroic and he died at sunset. However, the Hanshui River in Fangcheng still remembers Zhou Gezhao Hall, so unlike Qingchuan, it is still Yao Tianshun's day, with hundreds of millions of people climbing to heaven, sweeping the ground, grabbing a clean place, seeing great achievements and celebrating today's happiness. Romantic talk is endless, and I can't appreciate the willow shade, jujube in front of the pavilion, grass color in front of the continent and plum blossoms on the river abroad. Note: Found in Yellow Crane Tower, Wuchang, the author is unknown. This may really be the first long couplet in ancient and modern times.