Re: Visa entry into mainland China

Re: Entry questions into China.
Dear Sir/Madame:
I'm holding a valid Canadian passport and a L visa valid for 10 years until 31 March 2017.
1. Do l need an invitation letter from a Chinese citizen if l intend to pay a visit to mainland China ?
2. Do l need to get a Nucleic Acid Test within 48 hours before boarding?
3. Do l have to present a return ticket or onward ticket at the port of entry, e.g Kunming? I am currently traveling in Malaysia intending to travel in China.
4. How long will l be allowed to stay in China once approval is granted ?

Expecting to hear from you soon. Thank you kindly.

Kelvin Ho.
Date May 1, 2023.