1c Parcel Post (Q1).
Vertical pair, tied by "U.S. Postal Agency Shanghai, China Mar. 11,
1914" duplex on back of cover to Springfield Mass., printed return
address from Shanghai, fresh and Very Fine
(Image) 
25c Parcel Post (Q9).
Bottom sheet margin with plate no. 6173, tied by "U.S. Postal
Agency * Shanghai, China * REG" registry oval, purple registry
handstamp, matching "Shanghai, China. (U.S. Postal Agency.) Registered Aug.
31, 1916" double-circle datestamp on back of blue cover from the American
Consulate General to Jersey City N.J., transit and receiving backstamps,
Very Fine and extremely rare use of 25c Parcel Post from Shanghai (Image) 
$1.00 Parcel Post (Q12).
Tied by "U.S. Postal Agency, Shanghai, China JUN. 21 10AM 1916"
duplex cancel on cover to Jersey City N.J., missing top flap and
minor edgewearVERY FINE. REPORTED TO BE THE ONLY KNOWN USAGE OF THE $1.00 PARCEL POST ISSUE USED ON COVER FROM THE U.S. POSTAL AGENCY IN SHANGHAI.
Lower denominations are known used, but the existence of this $1.00 used at the U.S. Postal Agency in Shanghai is truly remarkable. (Image)
$1.00 Parcel Post (Q12).
Wide margins and beautifully centered, used with 10c Orange, Panama-Pacific
(400A), each tied by New York registry oval and purple New York Aug. 27,
1915 registry datestamp on Importers' & Traders' National Bank tag to First
National Bank in Bethlehem Pa., tag is creased but does not affect $1.00
which does not adhere up at left, Very Fine, extremely scarce usage (Image)