China policy has played a role in U.S. presidential debate for decades, and continues to do so today. President Barack Obama and Governor Mitt Romney agree China needs to play by the rules when it comes to trade. They differ on whether the U.S. should be more aggressive when it comes to enforcing those rules. In this report produced by VOA's Mandarin Service and narrated by Amy Katz we take a look at the bi-lateral issues in the 2012 Presidential election