I don't see a booth 21912 in south hall on this diagram. Booth 21910 appears to be a booth on hold - with no name attached. You did mention sharing a booth. SEIKI is listed under other booth numbers - so it wouldn't be them.
I don't see a booth 21912 in south hall on this diagram. Booth 21910 appears to be a booth on hold - with no name attached. You did mention sharing a booth. SEIKI is listed under other booth numbers - so it wouldn't be them.