Bookstore. Seller of stationery, fiction, biography, games, boys' and girls' books, children's toy books, poetry and drama, religious books in 1924, manufacturer/distributor of "SWALLOW BRAND" (Carbons, Ribbons, Stencils) in 1934 :

• The 1924 North China Daily News advertisement warned: "Watch the Special Dollar Counter"
• The 1934 North China Daily News advertisement offered "Special prices for annual tenders and quantities".

Source/Reference: The Universal Dictionary of Foreign Business in Modern China, Sichuan People's Publishing House, 1995 (277-278).