Dare to ask where the road is? -- Deep thoughts on the Java way out (from graduate students' feelings about finding a job)

This is also a one-year double-election meeting. Although I am not a fresh graduate, I have also come from that stage (now I am studying), so I am very concerned about the development direction for my future.
This year, many well-known enterprises in China, such as Huawei and ZTE, and many of my undergraduate students have been able to pass their written examination and have the opportunity for an interview, during the conversation with personnel from these companies, they found a problem: "We don't need Java for underlying development, but use C ++ for underlying development, occasionally, Java is used for outsourcing. This is the case in China. It is only available for general Java Development in foreign countries! ".
I am confused. I have worked so hard to learn Java that I want to train myself in some well-known enterprises. But why do they not need Java?

Is it true that J2EE and J2EE cannot be used in China at all?
Do I have to go abroad to find a job after learning Java?
Is j2se only capable of outer vertex?

How can I plan the way out? Please kindly advise !!!
These are all real feedback from the social needs of the real society.

Don't talk about the same language. People who want to post comments love Java and know what their goals are!