Introduction to the Nanyang Industry Encouragement Association: The Nanyang Industry Encouragement Association is the first large-scale expo held in Chinese history. It was initiated and promoted by Zhang Jian. The expo is unprecedented in scale, with pavilions set up all over the country and even abroad. The expo attracted hundreds of thousands of people to visit, and the transaction amount reached tens of millions of silver dollars, which played a positive role in the development of China's modern industry.