Talk:Lu'an

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Lu'an treats the hemp district of the Pi River at Lu'an, in Anhui, as a growing area of fibre hemp. It has no growing region above it.

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Discussion

The Chinese Academy of Agricultural Sciences (Institute of Bast Fiber Crops): Lu'an hanma (六安寒麻) among the local varieties that made up most of China's hemp crop.
Statistics of the Lu'an statistics bureau and city government, published by the consultancy Chyxx (智研咨询) in 2022: 1,305 hectares sown in Lu'an in 2019, 1,215 of them in Yu'an District; 118 hectares at Subu in 2021.
An agricultural encyclopedia entry on hemp cultivation: the Lu'an hemp district grows huǒmá and hánmá, in a rotation of hemp and grain.

The status is Active: hemp was sown at Lu'an in 2019 and at Subu in 2021.

The border follows Yu'an District of Lu'an, Anhui, the district that holds Subu town, as mapped in OpenStreetMap (relation 3243392, read 21 October 2026). It is about 1,900 km², against about 15,500 km² for the whole of Lu'an city, which is not used.
The elevation and land-cover rules used for other hubs (ground above 4,000 m, and land that ESA WorldCover 2021 maps as bare, snow and ice or open water) take out less than 0.5% of the district, so the border is the district's own line.
Check points inside the border: Lu'an city, Subu town.

The page takes the name of the city. The growing is concentrated in Yu'an District, on which the border is drawn.

Chyxx (2022): a consultancy digest that credits each figure to the Lu'an statistics bureau or the city government; read in full. The figures are given as the bureau's.
The Institute of Bast Fiber Crops' report on a national research system for bast-fibre crops: read in full. The institute posted it on 9 April 2015; its figures run to 2006, so the list of local varieties may describe an earlier crop than the posting date.
The agricultural encyclopedia entry: read in full on the 智汇三农 platform.

Subu's hemp area. The same report says that Subu has several hundred hectares of hemp and gives 118 hectares for 2021. The article gives both, the first as the report's description.