to cooperate; partner

partner

(bound form) shelves (for files); pigeonholes; (bound form) files; crosspiece (of a table etc); (bound form) (of goods) grade; vendor's open-air stall; (Tw) timeslot for a show or program; classifier for shows; classifier for events, affairs etc; Taiwan pr. [dang3]

(Tw) gear (variant of 擋|挡[dang3])

superior quality; high grade; top grade