Unfortunately I don't have a game save, but Kublia Khan's bonus can be exploited for liberated civs. This is easier to test with Mongolia, cos you get the bonus as soon as you start a trade route. Steps to reproduce: 1. Send a trader to a civ. (Get tech/civic boost). 2. Once civ is defeated, liberate civ. 3. Send another trader to civ. (Get tech/civic boost). [Rinse, repeat]. If you play TSL Earth against Europeans many will fall to loyalty, so giving you plenty of civs to exploit this. Or play Dramatic Ages on TSL East Asia. --- Another version of exploit from elsewhere in forum (see post#2): 1. Send trader to a foreign civ city. (Get tech/civic boost) 2. War and conquer city. 3. Trade with another city in said civ. (Get tech/civic boost). [Rinse, repeat].