The group surveyed the area several times from early in Juche 101 (2012).

The relics mainly consist of two parts.

The findings include stone and brick structures. The structures comprise a fireplace, a combustion room and a smoke duct. Found in the fireplace are a fuel hole flanked by two ash pools.

The floor of the combustion room whose four walls were built with stones was reinforced with stone and lime. Found below it was reddish earth that seemed to have been exposed to high heat.

The smoke duct was found in the rear part of the room in the middle of which is an alcove for putting a round plate on.

A pool filled with thick black ash was also found. This is connected with a ditch for drawing sea water and in the center is a stone structure of a certain height.

Other relics include various kinds of earthenware, bricks, piece of a flat iron pot, melted iron clot, animal bones and horn pieces.

The new findings have been confirmed to be sea salt production relics belonging to the period of Koguryo.

Earthenware and bricks were confirmed to belong to the mid 4th century.

The salinity is high in the stratum around the relics and a thick layer of ash was found, a clear proof of the above-said relics.