Disloyalty: Mr. Yang Chenning resolutely became an American citizen at the most difficult time for his motherland, and even his father's persuasion was in vain as he refused to return home to serve. The triumphant Yang after receiving the Nobel Prize was deeply troubled by not being able to buy a house in Long Island (he eventually settled for buying a house in the professors' area).
Filial Disobedience: By becoming an American citizen, Yang's father never forgave him for this decision until his death, making him unfilial.
Unkindness: When his homeland became prosperous, he returned under the mutual炒作 (hype) with a prestigious university, to enjoy his retirement years. Since returning to China, he has been moving around, busy with self-promotion, unwilling to work diligently.