Which province is Lu short for?

In ancient times, fishermen in Shanghai invented a bamboo fishing tool "Hu". At that time, there was no place name of Shanghai, so this area was called "Hudu", so Shanghai was called "Shanghai" for short.

During the reign of Wu Yueshi, Huating was changed to Jiaxing Xiuzhou, where he was ruled. Major changes took place in the Northern Song Dynasty. In the Northern Song Dynasty, Huating County still belonged to Xiuzhou, but the land area of Shanghai began to grow and gradually moved to the eastern sea area, and Chongming Island gradually took shape. At that time, Huating County was bounded by Songjiang (now Wusong River), with Suzhou in the north and Xiuzhou in the south. On the south bank of Songjiang, which is about to enter the sea, a place name called Shanghai Affairs appeared.