user45830: i had knew that the old nodes will reject the new blocks.how about the new nodes treating the old blocks?
i got the definition of the hard fork in the Hard Fork.but it didn't explain how did the new nodes treat the old blocks.

user208: It depends on the exact rule changes.

45830: <p>i had knew that the old nodes will reject the new blocks.how about the new nodes treating the old blocks?
i got the definition of the hard fork in the <a href="http://www.investopedia.com/terms/h/hard-fork.asp" rel="nofollow noreferrer">Hard Fork</a>.but it didn't explain how did the new nodes treat the old blocks.</p>
 208: <p>It depends on the exact rule changes.</p>
