| Getting an F visa ( business ) only requires a faxed copy of an invitation from a Chinese company to accompany the application.
I am not sure but open ended multiples are only available as 1 yr , 2 yr and 3 yr.
I have a 2 yr unlimited entry F visa . However it is known that this is usually only issued after you have a record of single and double entry visa. Also I am talking from as a person with a UK passport. I am not sure if more restrictive rules for Urkrainians.
Best idea to truck on down to Wanchai China Resources Building and ask the visa office there. You will definately need an invite letter for the F visa as the tourist visa will not meet your requirement for unlimited multiple entry. | 
