You connect signals between sheets using the sheet connector.
Press the 'S" key and a sheet connector will show. Wire it to the signal you want to connect to and give the signal a name.
In the connecting sheet do the same and give the signal the same name.
HI, Thanks your good advice! After connecting the sheet connector and same signal input or output by wire tool, I could change signal name of the sheet connentor. Then, I could buid successfully.