Loose Fit, Tight Spot
The pop-up's slogan is "轧闹忙" ... Shanghainese for "joining the crowd." The activation is deliberately focused on local Shanghai audiences, not translated Mandarin.
For many brands in China right now, winning the premium position is essential AND that means winning in Shanghai.
Agile Retailing in China
This pop-up fits within the broader trend in China retail towards agile retail.
Brands have become much more flexible and fast with responding to trends moving for/against the brand ...feeding momentum where it is emerging ... deploying alternate activities to recover failing momentum in other regions.

In the case of Levi's, this SHA activation fulfills a positioning imperative (premium move in mission critical city). Activations in Chengdu earlier in the year were more about driving volume in a higher growth region. At the same time doors are being closed in other locations.
The Premium Positioning Imperative
For Levi's, the current imperative is positioning. The brand has been running a premiumization strategy in China since 2019... fewer, better doors, lines like Midnight Blue Tab and Made-in-Japan, a local R&D center.
China's jeans market is essentially flat. If not for the trend shift to baggy jeans (baggy fits up 233% on TikTok Shop), the market would likely be down.

There's a hard split in spending between premium and discount that's been growing for years.
So far, Levi's is finding itself on the right side of this split, but likely just hanging on to the dividing line... while also trying to maintain the volume of 300+ retail doors nationally.

In this context, activations in Shanghai provide essential anchoring effects... helping Levi's build more equity in a taste-making market, even as volume is driven in other locations (eg. Chengdu).