K'ing Kung-Fu 2: Return of the Opium Wars by Marshall Macao

K'ing Kung-Fu 2
Return of the Opium Wars
by Marshall Macao 
1973, Freeway Press

Picks up immediately after the first installment, with K'ing chasing Kak across China. Kak links up with the evil Red Circle, while K'ing recruits the help of the Blue Circle, including a Black kung fu practitioner called The Moor.

The pace picks up, with a wider variety of fight scenes than the first installment, including a fight through an underground opium den while high as a kite, but there needs to be more plot propping it up. I also have an aversion to series in which there's the same villain in each installment who gets away at the end.

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