Phenomenon
FlashPro-CC can not perform hardware debug on IAR EW8051 V7.0 and V7.1.

Solution
Find the FlashPro-CC user manual on the internet.
In the last section, i found the guidance on the debugger setting.
When the MCU type is explicitly given, the debugger can work with both V7.0 and V7.1.
debugger.jpg

Analysis
The CPU information is given in the general option. But it just gives "CC1110", which is not clear enough.