Partner flights must be in low. When you have DL medium or high on the same award ticket, it prices additively. 105K = RT partner low at 45,000 + RT DL medium (?) at 60,000 would be my guess.

If you can find availability that avoids DL flights, it should price at 45,000 RT.

CZ long haul is good, especially on their A380. IME domestic CZ flights on narrow body aircraft have nice big domestic FC type seats with generous pitch. They give you slippers and a choice of two hot main courses for lunch/dinner, with beer and wine available (free). CZ intraAsia should be somewhere in between.