Summary:

• **What is the Tianfu Cup?** China has brought back a famous hacking competition called the Tianfu Cup, where computer experts compete to find security weaknesses in software and systems. This contest helps companies discover and fix problems in their technology before bad people can use them to cause harm.

• **Why is it more secretive now?** The competition is being run with much more privacy and secrecy than before, which means fewer details are shared publicly about what happens during the contest. This change likely happened because governments and companies want to keep sensitive information about computer security hidden from people who might misuse it.