中文：

郎咸平是一位著名的经济学家和金融专家，他在大陆的知名度和影响力非常高。那么，为什么郎咸平会在大陆受到如此热烈的欢迎呢？

首先，郎咸平在大陆的学术成就非常显著。他曾经担任多个知名大学和科研机构的教授和研究员，并在经济学、金融学、管理学等领域发表了大量的高质量论文和著作。他的研究成果在国际上也有很高的知名度和影响力，为中国经济学界在国际上赢得了很高的声誉。

其次，郎咸平在大陆的经济学课程和讲座非常受欢迎。他的课程和讲座内容丰富、深入浅出，能够让普通人了解经济学的原理和应用，深受学生和听众的喜爱。此外，他还通过各种媒体向大众传播经济学知识和思想，为普及经济学做出了很大的贡献。

最后，郎咸平在大陆的公共服务和公益事业也非常活跃。他曾经担任多个政府机构和公益组织的顾问和委员，为政府和企业提供专业的经济学分析和建议。他还积极参与公益事业和慈善活动，为社会做出了很大的贡献。

总的来说，郎咸平在大陆的知名度和影响力是因为他在学术研究、教学和公共事务方面的卓越表现和贡献。他的思想和观点不仅影响了大陆的经济学者和企业家，也对中国经济的发展和改革产生了深远的影响。

英文：

Lang Xianping is a famous economist and financial expert who has achieved a high degree of popularity and influence in mainland China. So, why is Lang Xianping so popular in mainland China?

Firstly, Lang Xianping's academic achievements in mainland China are remarkable. He has served as a professor and researcher at multiple well-known universities and research institutions, and has published a large number of high-quality papers and books in fields such as economics, finance, and management. His research achievements are also highly recognized and influential internationally, winning a high reputation for China's economics community internationally.

Secondly, Lang Xianping's economics courses and lectures are very popular in mainland China. His courses and lectures are informative and easy to understand, allowing ordinary people to understand the principles and applications of economics. He is deeply loved by students and listeners. In addition, he also spreads economic knowledge and ideas to the public through various media, making a great contribution to the popularization of economics.

Finally, Lang Xianping is also very active in public services and welfare undertakings in mainland China. He has served as a consultant and committee member for multiple government agencies and welfare organizations, providing professional economic analysis and suggestions for governments and enterprises. He is also actively involved in welfare undertakings and charitable activities, making great contributions to society.

Overall, Lang Xianping's popularity and influence in mainland China are due to his excellent performance and contributions in academic research, teaching, and public affairs. His ideas and views have not only influenced economic scholars and entrepreneurs in mainland China, but also had a profound impact on the development and reform of China's economy.