cover WUHU: 1904 (18 Apr.) envelope addressed to Scotland bearing C.I.P. 1c. tied by lunar dater with "WUHU" bilingual c.d.s. alongside, Hong Kong 4c. red tied by Shanghai c.d.s. with Moffat c.d.s. alongside, backstamps include Shanghai bilingual and lunar dater plus indistinct, rectangular numeral dater; an unusual cover with a lot of character