If I have a good idea or an idea that I want to sell to a big company that I have never met before, how can I achieve it?

1, you can find a company you like first, and then apply with your own creativity. After becoming its employee, you are naturally not afraid that the company will dump you. If you are motivated, you can learn from Stallone, Stallone and his story of promoting Loki, right?

2. If your idea can be made in kind, then make a kind and a lot of drawings and other materials yourself first. Then apply for a patent and negotiate with the company with the patent. As long as there is a patent in hand, the other company can only cooperate with you in development.

China National Intellectual Property Administration, People's Republic of China: /sipo2008/zlsqzn/sqq/

3. Start your own company, raise funds and develop yourself. This road is difficult, but if your idea is really worthy of adoption by big companies, it is also a good way to develop yourself.

That's all I can think of. I hope it helps you.

PS: pay attention to fraud prevention. Try to find a big company if you can. If you haven't heard of the other company, get to know the details of the other company. Pay special attention to personal safety when negotiating in the field. Father has a patent and wants to sell it to others. He was almost cheated.

Also, according to your description, this is a good idea you think, so be prepared for rejection.

I wish you success!