Is Shenyang worth a stop on the way to Harbin?
Yes — give it one full day, ideally two. The palace and the founding emperor's tomb are both UNESCO sites you cannot see anywhere else, and the food scene is the northeast at its most honest. Harbin is the spectacle; Shenyang is the history.
Mukden Palace vs the Forbidden City — which one?
Different things, both worth it. The Mukden Palace is earlier as a Qing seat, far smaller, and unmistakably Manchu — the octagonal throne hall and the Eight Banners' pavilions have no counterpart in Beijing. If you only ever see one palace, see Beijing's; if you have two hours in Shenyang, this is the one to see.
Is the palace really closed on Mondays?
Yes — as are the provincial museum, the city museum and the 9.18 museum (public holidays excepted). The Zhang mansion is the rare exception in September. Mondays are for Beiling Park, Xita and eating.
Getting there from Beijing?
High-speed rail from Beijing Chaoyang: 2.5–3 hours, ¥317–349 second class, with the fastest trains non-stop in under 2.5 hours. Overnight sleepers (about 7 hours, from ¥171) save a hotel night. Flying rarely makes sense on this route.
What should I eat first?
Chicken skeleton with hand-pulled noodles at 老四季 — the order every local steers you to. Then guo bao rou, then Laobian's steamed dumplings on Zhongjie, then an evening in Xita for cold noodles or ginseng chicken soup.
Can I use the 240-hour visa-free transit here?
Yes — Shenyang Taoxian is a designated port, along with Dalian's airport and seaport. It covers 55 nationalities with an onward ticket to a third country or region, and the stay is limited to Liaoning province.