Return to Singapore for 2 months and back to SZ again

I am a Singapore citizen and I have been in Shenzhen since Feb 2020 and now I need to return back to Singapore as my mum needs to have a medical check-up and I am the only son.

My wife is china and I have my own property here in Shenzhen. And, I am also a partnership with a company here in SZ where I need to come back to handle a project in Aug till Dec.

Meanwhile, I have a letter of invitation from the company in SZ and also I did apply for visa for a year.

Apparently, I am also holding a work permit ID in HK where I have my own registered office in HK.

So, I would like to check if I am able to return back to SZ china in Aug based on all the above information and letter from SZ company?

Your kind support would be very much appreciated.