shaded. The issue, known as the Central Trust Print, was made necessary when Hong Kong fell to the Japanese in December 1941. The first stamp in this issue appeared on 1942-09-15. The stamp was printed in the wartime capital of Chongqing, as well as by the Pacheng Printing Co. of Nanping. There are several varieties of this issue based on paper, secret marks and perforation, as well as a large number of overprints. Sixth issue The sixth issue is characterized by a larger portrait of Dr. Sun in a double frame with a square-toothed line between the frames, lens forms in the side panels, and Arabic numeral tablets on banners in the lower corners. It was first produced on native paper by the Chung Hwa Book Co. of Chongqing in 1944, and includes nine values. A number of overprints exist. Seventh issue The seventh issue shows Sun Yat-sen in an oval frame with wavy lines as side ornaments. The stamps appeared in 1945, and were typographed by the Dah Tung Book Co. Printing Works in Chongqing. The combination of poor quality paper, ink, equipment and workmanship resulted in a wide range of unintended varieties, most of which are ignored by philatelists. The set appears with four face values: $2.00, $5.00, $10.00 and $20.00 perforated 12½. Several overprints also exist. Eighth issue The eighth issue is easily recognized since it is the only issue in which the tablet containing the Arabic numeral value is centred at the bottom of the stamp. Appearing in December 1945, this is the first of these Sun Yat-sen issues to be produced after the Japanese surrender when the two Chinese factions could abandon their uneasy alliance and get back to the business of fighting each other. This series was produced by Chongqing's Central Trust Bureau Printing Works, which was now renamed the Central Engraving and Printing Works. The series was typographed on white wood free paper. The printing still has a crude appearance and the perforations with small holes are often rough. The six values in this set, $20.00, $30.00, $40.00, $50.00, $100.00 and $200.00 reflect the growing inflationary problems of the time. A number of overprinted issues were also produced Ninth issue The ninth issue was recess printed by the Dah Tung Printing Works in Shanghai where better facilities were available; this is reflected in the improved general appearance of the stamps. This issue, whose