Your paper has not been published, it is not public, it does not belong to public technology, and it meets the novelty.
Now, if you find a reliable agency to help you apply before 23rd, there will be no problem. The 23rd mentioned here is the date when the China National Intellectual Property Administration Patent Office received the documents. Maybe time is running out, so hurry up. If the journal is published, you can't apply for a patent.
When looking for an agent, you should look for qualified people, not individuals. Cheap and easy to be cheated. Good luck.