Cadillac CT6 1st Generation Forum (2016+)
The CT6 PHEV was made in China because it's made FOR China, where people actually buy CT6s.
Just to give you a quick idea... In Jan '18, 2234 CT6s were sold in China, of which 451 were PHEV. There were 628 CT6 total sold in the US for Jan '18.
Latest PHEV sales figures I could find.