Hsieh (2005) proposes that embedded complementizer shuo is head-initial since it precedes its TP complement, as Taiwanese kong does, according to Simpson and Wu (2002).
a head-final CP system could also reach the same outcome, shown as below: Besides, suppose C2 has a feature, assuming it is EPP, which triggers movement, then why TP does not move to [Spec,C1P]?