Is china open for buisness travellers

Dear Sir /Madam
My name is Amare Assefa I am a businessman engaged in the manufacturing of paper and carton as well as water-based ink.
I had Purchased my machines from Henan province some four years back from a factory located in Qinyang city
currently, we are in need of spare parts for our paper machine which we had tried to order online and even by using social media but to our regret, there are usually issues in understanding one another with suppliers.
Hence our question are the following
1) Is it allowed to travel to China at this time?
2) What are the requirements and procedures that need to be followed?
3) Once I arrive in china can I freely travel between cities
Thanking you in advance and please provide us with information that you may think we need to know
Regards
Amare