City Hall Cold Jjamppong — Taeyang’s Summer-Only Chilled Chinese Noodle Soup with Real Wok-Fire Flavor (₩11,000, Open 24h)

Neighborhood Eats · City Hall

A cold noodle soup that somehow still tastes like it came screaming out of a wok. Summer only. Open around the clock.

By a hotel facilities engineer Verified July 2026 City Hall

Open 24 hours Great for solo diners Cards accepted Korean menu — translated below

Cold jjamppong chilled Chinese noodle soup in a stone bowl at Taeyang, City Hall, Seoul — **Naeng-jjamppong (₩11,000)** — cold jjamppong, a summer-only thing. Icy broth, seafood, cabbage, bean sprouts. And here’s the trick: it still tastes of wok fire. Cold food, smoky flavor. I did a double take.

I look after hotels around City Hall, so I eat in this neighborhood a lot. And in July, this is the bowl I keep coming back for — a cold noodle soup from a 24-hour Chinese kitchen.

Taeyang is a proper Korean-Chinese joint on Sejong-daero, next to the Starbucks, open 24 hours. Most of the year it’s about hot jjamppong and jjajangmyeon. But in summer they run a cold version — naeng-jjamppong — and that’s the one to get.

Here’s what threw me. It arrives with a pale, almost white broth. I sat there thinking, what is this? Then I found the dadaegi — a little knot of chili paste — tucked inside. Stir it through and the whole bowl blooms red in seconds.

It’s not fiery. Just gently spicy, and sweet-and-sour, and really good. But the thing that got me was the broth itself — a deep, meaty umami, with that smoky wok flavor hiding in something served cold. Add the fried dumplings on the side and you’re set.

At a Glance

Taeyang 태양 (太洋) · 시청점

Address	72-1 Sejong-daero, Jung-gu, Seoul (서울 중구 세종대로 72-1) Open in Naver Map Use Naver — Google Maps walking directions don’t work in Korea.
Subway	City Hall Station (Lines 1 & 2) — about 3 min · look for the Starbucks on the corner
Hours	Open 24 hours
Nearby hotels	UH Suite Deoksugung (same street, ~2 min) and UH Suite Central, plus The Plaza, Westin Josun Seoul and Koreana Hotel — all within a short walk
Budget	Noodles & rice dishes ₩8,000–13,000 · dumplings ₩7,000
Solo dining	Yes — noodle and rice bowls are single servings. Easy solo meal.
Payment	Cards accepted · no tipping
Verified	July 2026 — I eat here on workdays

Two bowls of cold jjamppong with fried dumplings and pickled radish at Taeyang, City Hall Seoul — The full spread: two bowls of cold jjamppong, a plate of fried dumplings, and the usual danmuji (yellow pickled radish) and sauce on the side.

What to Order

It’s a Korean-Chinese menu — jjamppong (spicy seafood noodle soup) and jjajangmyeon (black-bean noodles) in every variation, plus rice dishes. The cold jjamppong lives in the seasonal section at the bottom. Here’s the map.

Korean menu board at Taeyang Chinese restaurant with jjamppong and seasonal cold noodles, City Hall Seoul — The table menu (Korean only). The seasonal cold dishes — including the cold jjamppong — are the bottom row. Translated below.

Taeyang · City Hall

The Full Menu

Korean-Chinese · open 24h · Korean board, translated line by line

Plate of crisp fried dumplings (gunmandu) at Taeyang, City Hall Seoul — Taeyang gunmandu — 8 crisp fried dumplings for ₩7,000. Get a plate to share with the noodles.

Eating solo?

Easy. Get the cold jjamppong (summer) or a regular jjamppong, and it’s a full single-serving bowl. Open 24 hours, so it works for an odd-hour meal too.

Two or more?

Order a couple of different bowls — cold and hot — add a plate of dumplings, and maybe the seafood tray-jjajang (해물쟁반짜장, ₩21,000 for two) to share.

The Room

Inside: a smarter-than-usual Chinese spot

Warm wood-panelled interior with chandeliers at Taeyang Chinese restaurant, City Hall Seoul — Nicer than your average noodle joint — wood panelling, chandeliers, comfy booths. There are private rooms upstairs, too. Still totally fine for a quick solo bowl.

Directions

Finding It

Storefront of Taeyang Chinese restaurant with 24H sign, City Hall Seoul — Look for the red-and-gold “태양 (太洋)” sign and the big “24H OPEN” box. The window shows photos of the cold jjamppong and cold noodles.

Street view on Sejong-daero showing the jjamppong signs next to Starbucks near City Hall, Seoul — On Sejong-daero, right by a Starbucks — watch for the tall red “짬뽕 24시” (jjamppong, 24 hours) banners over the sidewalk.

First-timer Guide

How to Order

Seat yourself — walk in and take any open table.
Order at the table — point at the menu below or the photos in the window. In summer, ask for naeng-jjamppong (냉짬뽕).
Water and pickled radish are on the table. The danmuji (yellow radish) and sauce come free with your meal.
Pay at the counter on the way out. Cards are fine. No tipping — ever, anywhere in Korea.

Good to know The cold jjamppong is a summer-only seasonal dish — it comes off the menu when the weather turns. It’s open 24 hours, so it’s a lifesaver for a late arrival or an early flight.

Recommended & personally verified

I keep hotels in this neighborhood running for a living, and this is where I actually eat. Staying at UH Suite Deoksugung, UH Suite Central, The Plaza or the Westin Josun? It’s a short walk — and it’s open whenever you are.