The only person that will “benefit” “a lot” from this proposal is the scammer who sent it.  This scammer is hoping you will reply and then he or she will starting asking you to send money to pay fees.  Think about it.  Would anyone you don’t know contact you completely randomly (along with thousands of others) and genuinely offer you a proposal for millions of dollars?  Of course they wouldn’t.

Ignore this scammer.

Greeting from Hong Kong

Dear Friend, this is Mr.Ming Yang from Hong Kong. I am sending you this message concerning a
Business Proposal of $24,500,000.000 and I want you to partner with me in this project.
This business with benefit you a lot.

Please contact me back with the below address for details.

Thanks. I await your prompt response.

Mr.Ming Yang