You can use this one for exams.

This Mandarin Chinese Dictionary is for elementary to intermediate learners of Chinese.It's a totally new dictionary designed specifically for elementary to intermediate learners of Chinese, and contains all 3,051 vocabulary items prescribed for Levels A and B of the internationally recognized test of Mandarin language proficiency, Hanyu Shuiping Kaoshi (HSK).

This new dictionary defines critical terms relating to China’s politics since 1949. It comprises succinct definitions covering core political structures, ideologies, and practices, as well as individuals, groups, and concerns that are essential to them.
Covering the full spectrum of Chinese politics, authoritative and up-to-date entries include charm offensive, cybersecurity, hukou system, Silk Road, and United Nations Peacekeeping Operations.