School;
of;
Mathematical;
Sciences,;
LMAM,;
Peking;
University,;
Beijing;
100871,;
China;
School;
of;
Mathematical;
Sciences,;
LMAM,;
Peking;
University,;
Beijing;
100871,;
China;
School;
of;
Mathematical;
Sciences,;
LMAM,;
Peking;
University,;
Beijing;
100871,;
China;
causal; chain,; causal; inference,; counterfactual; model,; graphical; model,; potential; causal; function.;