At a market candy stall, milky-white crystallized sugar blocks are piled up like small hills, their shape closely resembling the cross-section of a lung -- this is what Quảng Ngãi locals call "đường phổi," lung-shaped rock sugar. Since the 19th century it's sailed out from this land's ports to France, China, and Japan, except exactly which port it came from is something nobody can pin down precisely anymore.
Cross-confirmed by a government body and state media as a representative Quảng Ngãi cane-sugar product
The culture column of Cẩm Thành ward's official Quảng Ngãi City government website (camthanh.quangngai.gov.vn) and Ho Chi Minh City's tourism magazine (tcdulichtphcm.vn) cross-confirm that Quảng Ngãi's cane-sugar culture already flourished in the 19th century. Lung-shaped rock sugar, alongside kẹo gương and mạch nha, is known as one of Quảng Ngãi's three major sugar specialties, exported since the 17th century via ports including Hội An, Cổ Lũy, Sa Cần, and Sa Huỳnh to France, China, and Japan -- an important trade good in Quảng Ngãi's culinary history.
Honest clarification: sources disagree on the administrative status of the traditional export port Cổ Lũy, so this entry uses a market anchor instead
It has to be said honestly that while verifying administrative boundaries, sources were found to disagree on Cổ Lũy port (at the mouth of the Trà River) -- one source places it in Nghĩa Phú ward (phường Nghĩa Phú) within Quảng Ngãi City, another places it in Nghĩa Phú commune (xã Nghĩa Phú, huyện Tư Nghĩa) in Tư Nghĩa district, and this entry was unable to independently confirm which is correct. To avoid marking a coordinate at a location with disputed administrative status, this entry instead anchors on Quảng Ngãi Market, within the city's confirmed core territory, as a representative retail point, rather than forcing a determination on Cổ Lũy port's administrative status or speculating on its exact origin. Sharing the same "three cane-sugar legends" context as kẹo gương and mạch nha, all three differ entirely in form (crystallized sugar blocks versus transparent peanut brittle sheets versus malt syrup) and craft, and this entry honestly notes that the three share the same cane-sugar culture while remaining distinct, independent items that don't replace one another.
How to Buy It Like a Local
- Widely sold at retail points such as Quảng Ngãi Market -- good for picking some out in person.
- Firm and chewy in texture -- the traditional way to eat it pairs it with hot tea, or lets it slowly dissolve in the mouth.
- To understand the cane-sugar trade history in more depth, compare this entry alongside kẹo gương and mạch nha in this guide.
An Honest Look at This Sugar's Origins
- Sources disagree on the administrative status of the traditional export port, Cổ Lũy -- this entry couldn't independently confirm it and doesn't speculate on the exact place of origin.
- To avoid marking a coordinate at a disputed location, this entry instead anchors on Quảng Ngãi Market, within the city's confirmed core territory, as a representative retail point.
- Grouped with kẹo gương and mạch nha as Quảng Ngãi's "three cane-sugar legends," but all three differ entirely in form and craft and are entered independently.
Hold a piece of lung-shaped rock sugar in the mouth and the sweetness slowly dissolves. Nobody can say for certain which port this sugar came from, but the merchant ships that sailed out in the 19th century carried exactly this sweetness, simmered from this land.