Tangram City: My Favorite Mechanism

About Tangram City, from BoardGameGeek:

Long ago, in a beautiful eastern kingdom, a queen summoned her city planners to build her people magnificent new cities. Tradition calls for harmony between the human and natural realms, with the shape of a rectangle viewed as ideal for building fortification. The city planners set out to build new cities for their queen. Who will build the best city and be rewarded with all the riches of the kingdom? In Tangram City, you place city tiles on your board using secret information about what city tile will come up next. As the city tiles are double-sided, plan your layout with the goal of harmony and the shape of a rectangle in mind. At the end of a round, you receive points for the largest rectangle on the board, and at the end of the game, bonus points for harmony between the realms. · Build a big, harmonious city using two-sided tangram tiles · Plan ahead using the secret information only you have