Then its "tourist" visa so yes you can.
By the way, China and Pakistan locates in totally different areas.
They're still two different countries as are Poland and Czech republic...maybe I should have said China and India - both nextdoor to each other..No?
There _is_ such thing as national long stay visa.
This is why I asked if it was a Schegen visa which is a short stay tourist visa, the OP stated they had a "Czech visa, if that had been the case then the visa is specifically for that country.
Can I enter first to Poland having a Czech visa?
Once its Schengen visa
You should have been clear in your first post and you would have received the correct information.