There is some talk going on about opening the border - for business travellers - but that is a start.
This is of course far away from the 5-Day-Shenzhen-Visa for casual visitors, but remember, up to now there is still zero travel into China (except for people with official visa) since March 2020. The people that are going now are either returning Chinese, or foreigners that are moving to China for work - that requires a visa (that can take a few month to apply), a costly test, and some weeks quarantine in a hotel in China.
Here is a link to an article in the South China Morning Post:
However, RTHK writes as early as February