score:6
According to this Wikipedia list: https://en.wikipedia.org/wiki/List_of_largest_empires1
The Xia dynasty was at its largest about 1800 BC with an estimated area of about 450,000 square kilometers or 170,000 square miles.
The Shang dynasty was at its largest about 1122 BC with an estimated area of about 1,250,000 square kilometers or 480,000 square miles.
The Zhou dynasty was at its largest about 1100 BC with an estimated area of about 550,000 square kilometers or 210,000 square miles.
The Qin dynasty was at its largest about 220 BC with an estimated area of about 2,300,000 square kilometers or 890,000 square miles.
The Western Han dynasty was at its largest about 50 BC with an estimated area of about 6,000,000 square kilometers or 2,320,000 square miles.
The Eastern Han dynasty was at its largest about AD 100 with an estimated area of about 6,500,000 square kilometers or 2,510,000 square miles.
The Eastern Wu dynasty was at its largest about AD 221 with an estimated area of about 1,500,000 square kilometers or 580,000 square miles.
The Shu Han dynasty was at its largest about AD 221 with an estimated area of about 1,000,000 square kilometers or 390,000 square miles.
The Chao Wei dynasty was at its largest about AD 263 with an estimated area of about 2,000,000 square kilometers or 770,000 square miles.
The Western Jin dynasty was at its largest about AD 280 with an estimated area of about 3,100,000 square kilometers or 1,200,000 square miles.
The Former Zhao dynasty was at its largest about AD 316 with an estimated area of about 2,000,000 square kilometers or 770,000 square miles.
The Later Zhao dynasty was at its largest about AD 329 with an estimated area of about 2,500,000 square kilometers or 970,000 square miles.
The Eastern Jin dynasty was at its largest about AD 347 with an estimated area of about 2,800,000 square kilometers or 1,080,000 square miles.
The Former Qin dynasty was at its largest about AD 376 with an estimated area of about 2,000,000 square kilometers or 770,000 square miles.
The Northern Wei dynasty was at its largest about AD 450 with an estimated area of about 2,000,000 square kilometers or 770,000 square miles.
The Liu Song dynasty was at its largest about AD 450 with an estimated area of about 2,000,000 square kilometers or 770,000 square miles.
The Liang or Southern Liang dynasty was at its largest about AD 502, 549, or 579 with an estimated area of about 1,300,000 square kilometers or 500,000 square miles.
The Northern Qi dynasty was at its largest about AD 557 with an estimated area of about 1,500,000 square kilometers or 580,000 square miles.
The Northern Zhou dynasty was at its largest about AD 557 with an estimated area of about 1,500,000 square kilometers or 580,000 square miles.
The Sui dynasty was at its largest about AD 589 with an estimated area of about 3,000,000 square kilometers or 1,160,000 square miles.
The Tang dynasty was at its largest about AD 669 or 715 with an estimated area of about 5,400,000 to 10,760,000 square kilometers or 2,080,000 to 4,150,000 square miles.
The Song dynasty was at its largest about AD 980 with an estimated area of about 3,100,000 square kilometers or 1,200,000 square miles.
The Liao dynasty was at its largest about AD 947 or 1111 with an estimated area of about 2,600,000 to 4,500,000 square kilometers or 1,0000,000 to 1,740,000 square miles
The Western Xia dynasty was at its largest about AD 1100 with an estimated area of about 1,000,000 square kilometers or 390,000 square miles.
The Yuan dynasty was at its largest about AD 1310 or 1330 with an estimated area of about 11,000,000 to 13,720,000 square kilometers or 4,250,000 to 5,300,000 square miles.
The Ming dynasty was at its largest about AD 1450 with an estimated area of about 6,500,000 square kilometers or 2,510,000 square miles.
The Qing dynasty was at its largest about AD 1790 or 1820 with an estimated area of about 12,160,000 to 14,700,000 square kilometers or 4,700,000 to 5,6870,000 square miles.
The estimated areas of some of those dynasties at their largest are very uncertain according to this list, and I suspect that the areas of some dynasties are less certain than the list indicates.