. . . "Song dynasty" . "Jin dynasty" . . "Wanyan Liang's war" . "Battle of Caishi" . . . . "18,000" . "1161\u20131165 invasion of the Southern Song dynasty" . . . "Southern Song dynasty" . "40,000" . . . . . "China" . "Caishi" . "Battle of Caishi" . . . . . "Song victory" . . . . . . . . "famous ancient battlefield" . . . .