Information security major is better in that company in Shanghai (100).

There are two companies that do the most information security in China: Venus Star and Lv Meng. These two companies have branches or subsidiaries in Shanghai. You can consider it.

There are many information security companies, but most of them are small in scale and mainly focus on information security products.

It is recommended to go to Venus or Lumen, where there are both safety products and safety services. More formal.

You can also consider foreign companies. Most foreign companies that do information security are products. It is also good to know about safety products.