中文：

600111是中国南方航空股份有限公司的股票代码，其股权登记日是每个会计年度结束后第一个交易日。根据这个规律，我们可以推断出600111的股权登记日应该是每年的1月4日左右。

股权登记日是上市公司进行分红派息、转增股本等权益分配的日子。在股权登记日持有或买入该公司的股票，就可以享受到这些权益。因此，股权登记日前后，投资者应该关注上市公司的公告，以便及时了解公司的最新动态和投资机会。

对于600111的投资者来说，股权登记日是一个重要的日子。在这一天，他们可以享受到南方航空公司的分红派息或转增股本等权益分配。此外，投资者还可以通过分析南方航空公司的财务报表和业绩表现，来评估该公司的未来发展潜力和投资价值。

总的来说，股权登记日是投资者关注上市公司的重要日子之一。对于600111的投资者来说，这一天是他们享受权益分配的重要机会，也是评估南方航空公司未来发展潜力和投资价值的重要时机。

英文：

600111 is the stock code of China Southern Airlines Co., Ltd. Its equity registration day is the first trading day of each fiscal year. According to this rule, we can deduce that the equity registration day of 600111 should be around January 4th every year.

Equity registration day is the day when listed companies carry out dividend distributions, stock dividends, and other equity distributions. If you hold or buy the stock of a company on the equity registration day, you can enjoy these rights. Therefore, before and after the equity registration day, investors should pay attention to the announcements of listed companies in order to understand the company's latest trends and investment opportunities.

For investors of 600111, equity registration day is an important day. On this day, they can enjoy dividend distributions, stock dividends and other equity distributions of China Southern Airlines. In addition, investors can also evaluate the future development potential and investment value of China Southern Airlines by analyzing its financial statements and performance.

Overall, equity registration day is an important day for investors to pay attention to listed companies. For investors of 600111, this is not only an important opportunity to enjoy equity distributions but also an important time to evaluate the future development potential and investment value of China Southern Airlines.