- investigational
- 一个思想史的考察 西方马克思学的形成和发展=An Investigation from the Perspectve of Intellectual History The Formation and
- COVID-19起源：有关武汉病毒研究所的调查 / The Origin of COVID-19: An Investigation of the Wuhan Institute of Virolog
- COVID-19起源：有关武汉病毒研究所的调查 / The Origin of COVID-19: An Investigation of the Wuhan Institute of Virolog
- COVID-19起源：有关武汉病毒研究所的调查 / The Origin of COVID-19: An Investigation of the Wuhan Institute of Virolog