Is it true or false to process the Chinese characters in Shenzhen? Is it true that it costs 4 yuan to pay a deposit of 2 yuan and paint the Chinese character with raw materials?

It's not reliable. The so-called outward processing projects on the Internet, such as jewelry, beading, ballpoint pen processing, wet tissue, charging treasure, LED and other electronic products, are usually scams. You cheat money with various names such as deposit, material payment, equipment deposit, logistics fee, insurance premium, etc. Be careful not to be deceived. The same is true of this one you mentioned.