If I understand correctly, the landlord should mean 6,543.8+0,000 yuan composed of 100 yuan notes.
100 RMB: length 155 mm, width 77 mm and thickness 0. 1 mm,
1 ten thousand yuan is 1 ten thousand hundred-dollar bills.
The total volume is:155× 77× 0./kloc-0 /×10000 =11935000 (cubic millimeter) =1.933.
The 20-inch carry-on suitcase has a capacity of about 38 liters, and it can easily hold 3 million yuan of hundred-dollar bills.
Even considering that the thickness of old coins will increase, a 20-inch boarding box can easily hold 2 million, no problem.