Hi Yongping,
Welcome to IceInSpace
Sorry,
Our Regular observing site is privately owned and gated (locked).
I am not aware of it having been used for Stargazing for a few years now (pre-Covid).
I am currently not well, and have sold most of my astro gear.
We have used a park in Bloodtree Road for observing as an alternate site on occasions and this may suit your needs. I dont expect there will be anyone else there this Saturday, so It is up to you if you want to risk it.
Hopefully someone else may be interested and able to suggest something as well, or join you.
Regards