different softwares have different definitions. For example, in the software of a communication letter, There are the following stocks:

421 Nanjing Zhongbei

544 Zhongyuan Environmental Protection

548 Hunan Investment

685 Zhongshan Public

753 Zhangzhou Development

826 Hejia Resources

897 Jinbin Development

931. 6187 ST Junior High School

6215 Changchun Economic Development Zone

6236 Guiguan Electric Power

635 Shandong Expressway

6386 Beiba Media

6611 Public Transportation

6662 Johnson & Johnson Holdings

6741 Huayu Automobile

61.

public utilities are generally not affected by the economic cycle. No matter how depressed the economy is, people can't save the necessities of life anyway. Reflected in the performance of public sector stocks, it shows a stable trend, and the fluctuation of stock prices is relatively small. There is little possibility of ups and downs, and the investment risk of this industry is relatively small compared with other industries. The annual performance of public institutions will not fluctuate greatly, and some public institutions with large plates and stable performance are often held by large funds for a long time.