Excuse me, what does this sentence in Zhuangzi Gengsang Chu mean? Why is he followed by many people?

Your problem in "Zhuangzi Gengsang Chu" is: Nan Rong grabbed food and went to Lao Zi's place for seven days and seven nights. Lao Tzu said, "Where did the son come from?" Nan said, "Wei Ye." Lao Tzu said, "Why did Zi come with others?" Nan Rong turned back in fear. Laozi said, "I don't know what I mean?" Nan Rong bowed down and was ashamed. He leaned back and sighed, "I forgot my answer today because I lost my question." Nan Rongbi is a disciple of Geng Sangchu. He asked Geng Sangchu for advice on life protection. Geng Sangchu's answer didn't convince him, so he asked his teacher, Lao Zi. Zhuang Zinan invited Lao Tzu's story to express the truth of saving his life through Lao Tzu's mouth. So I said, "Why do so many people come with you?" It is to express a truth, to have a pure heart, not to worry about external things, to hide your heart inside and do nothing. To put it bluntly, it is a test of Nan Rongbi's mentality. According to the original text, Nan Rongbi turned to look behind him in horror. It shows that his heart for seeking Tao is not firm. Later, through his dialogue with Laozi, he made it clear that keeping a pure heart, having no distractions, not being bound by foreign things, not being bound by troubles, being indifferent to life, sharing weal and woe, and naturally achieving the goal of saving lives.

Pure hand tour, if you think it is suitable, I hope to adopt it!