Can i use one HD object to derive many addresses?

[wally-yu]

Hi team,

Thanks for your awesome codes! Really helps me a lot.

One question: I noticed your code example to generate many wallets. According to BIP32 or this pic: http://ppst62hmr.bkt.clouddn.com/derivation.png, we can say this is "depth=1", right?

i want to only use one private key to generate more addresses (without private key for each) which should be "depth=3", could you please help suggest how to do it using your existing codes?

Thanks in advance. Wally