About Tianxia: Silk Road, from BoardGameGeek:
As the rival kingdoms of the Warring States vied for dominance on the battlefield, a different struggle unfolded across the vast trade routes linking East and West. The Silk Road carried caravans laden with silk, jade, and grain through deserts and mountains, creating new opportunities for wealth and influence. Yet these routes were perilous: nomadic raiders threatened the land convoys, while pirates struck at ports along the eastern coast, demanding tribute or blood. To prosper in this age, rulers had to balance war and commerce, building prestige not only with armies and walls, but through mastery of exchange, trade, and the control of caravans.
The Silk Road offered fortune to those daring enough to command it - though few could escape its dangers.
Tianxia: Silk Road expansion introduces a new scoring opportunity at the end of each round. This scoring depends on the number of exchange actions they do, the scoring condition shown on the Caravan tiles, and the outcome of the Battles. There is also another threat the players must consider - the Pirates attacking the east coast.
-description from the publisher
