The continuing conflict between the U.S. and China has played a pivotal role in the decision by U.S. law firms to scale back in Greater China, and relations are expected to further deteriorate during the incoming Trump administration. But not all U.S. legal practices have suffered. Quinn Emanuel Urquhart & Sullivan, best known for its contentious practice, has thrived in the fractious climate, amid a sea of tit-for-tat regulations between the two superpowers.