Two questions about cycling in Vietnam

Hi cycling friends in Vietnam,

I will have a business trip to Hanoi and Ho Chi Minh City in early November. I plan to have a one-day city bike tour in HCMC in the weekend after work. It is pity that I can't stay there longer. Two questions:

1. It would be grateful if you could recommend a few must-go places and cycle routes. I prefer natural views while am also used to cycling around on the streets to experience the lifestyle of people.

2. Where can I hire a bike or join a bike tour in HCMC? Many thanks!

By the way, I am a WS host in Taipei, Taiwan. Autumn is a good season to cycle around Taiwan, especially the eastern coast. You will love it!

Cheers,

Fulin