秘而不宣

to withhold information / to keep sth secret

variant of 秘[mi4]

see 秘魯|秘鲁[Bi4 lu3]

secret / secretary

and / as well as / and so / but (not) / yet (not) / (indicates causal relation) / (indicates change of state) / (indicates contrast)

no; not so / (bound form) not; un-

surname Xuan

to declare (publicly) / to announce