Its very different to Singapore. I've no experience with Dubai.
With HK they expect a business plan (and other supporting documents). However they're not going to hold you to it (renewal is︀ pretty much a rubber-stamping exercise from my personal experience).
You typically need to show $1M︁ HKD in the company accounts, as well as personal assets of over $1M HKD too︂ (there are creative ways to do this, such as getting a short-term loan from a︃ family member etc).
While those amounts are not spelt out in the requirements exactly, it's︄ the general consensus amongst the agents that I've spoken to.