Xinxiangxian: Refers to the rural people who have taken root in the countryside for a long time, use their knowledge, technology and wealth to serve the villagers enthusiastically and make outstanding contributions, and have high prestige and influence in the local social life and the eyes of the people. Which of the following belong to Xinxiang Xian? ['Although Li has been doing business in foreign countries for more than 10 years, he always misses his hometown and donates a lot of money every year to pave the way to build bridges in his hometown to help the poor students in his hometown to complete their studies. The folks often run around to visit him.', 'Xiao Zhang returned to his hometown after demobilization, and became a well-known "farming king" in two or three years. In order to drive the folks to get rich together, he organized multiple training courses to teach practical farming techniques and experience for free. Praise.', 'For more than 20 years, Mr. Sun, the chairman of a city chamber of commerce, has used his rich experience accumulated for a long time to match the home and rural people who operate various agricultural and sideline products, and guide them in finding business opportunities.', 'After the retirement of a rural elementary school principal Cheng, he took advantage of his many students and extensive relationships to actively explore the historical and cultural resources of his hometown and develop the rural cultural tourism industry.']