Considering Han Li's high intelligence, learning ability, and ability to calmly analyze problems in The Legend of Mortal Immortal Cultivators, it is still possible for him to find a way to survive and prosper even if he comes to modern society and loses his mana.
Here are some of the actions he might take:
Learning & Adaptation
Han Li first assesses his own situation and realizes that knowledge is very important in modern society. He may actively study the modern education system, starting with the basics and gradually acquiring knowledge in the fields of languages, mathematics, science, technology, and social sciences.
Just like he cultivated and upgraded in "The Legend of Mortal Cultivation of Immortals", in the real society, he had to take the bachelor's degree, get a master's degree, and get a doctorate, and get his academic qualifications to the top, until he was rated as a postdoctoral. He didn't study to make inventions, but to make himself stronger.
Discover talent
After losing mana, ability is the mana of modern society. Han Li might turn his attention to other areas to discover and cultivate his other talents.
He may find that he has excellent gifts for logical analysis, innovative thinking, interpersonal communication, or leadership skills.
Engage in scientific and technological achievements
Han Li's high IQ and in-depth understanding of how things work may allow him to find a place in the field of modern technology. He may become a scientist, engineer, programmer, or inventor, using his wisdom to make friends with tech bigwigs and get access to other people's scientific and technological innovations.
The main reason is that this guy is also the master of not creating exercises in "The Legend of Mortal Cultivation of Immortals", and he doesn't do that kind of thankless work, it's all about taking it.
Start a business and make money
Han Li may use his wisdom and business insight to start his own company or get involved in business.
He may discover new business opportunities or optimize existing business models using the technology and resources of modern society. The scientific and technological innovation achievements obtained from the science and technology tycoons are commercially realized and the business is made money.
Relationships & Social Networks
Han Li may focus on building and maintaining relationships, expanding his influence through cooperation and communication with others. He may be actively involved in social activities, building a wide range of social networks and thus gaining a foothold in modern society.
And it is advantageous to integrate network resources, make your company bigger and stronger, and make the company more profitable. For women, they are also tools to expand their personal relationships, they have had a one-night stand, they have a wife at home, and there are many ambiguous objects outside.
In general, if Han Li came to the modern society, he must be a business tycoon who is very good at learning and making money, and he treats others generously on the surface, but in reality he is self-interested, and his main goal is to make money.