This is not a route that collects sights. It passes, in order, through an industrial hierarchy climbing from selling ground to production ground, from flat land to hillside.
Recommended route: The Changsin & Sungin Half-Day Walk
Order · Segment · Suggested time
1 · Near Dongdaemun (start) · —
2 · Entering the alley climbing the hill · 20–30 min
3 · The sewing workshop section — observe division of labor and logistics · 40–60 min
4 · Lunch at an alley restaurant · 40–50 min
5 · The quarry cliff viewpoint section · 30–40 min
6 · Descend and return to Dongdaemun · 20–30 min
From selling ground to production ground
The answer is climbing from flat land to hillside in order — see Dongdaemun's finished goods first, then climb the hill where those clothes were made, and Episode 8's insight that selling and production sit on different levels becomes something you confirm by walking it yourself Estimate.
On the alley, thinking of five neighborhoods
This Seoul neighborhood series began in Mullae and arrives on the hill of Changsin and Sungin. The two neighborhoods share one thing — behind every glamorous result is always someone's repeated labor. Remember that as you look down on Dongdaemun's lights from the quarry cliff, and this half day becomes not sightseeing but witnessing Estimate.