Step inside Shanghai’s sprawling Xujiahui Metro City mall and you’ll find what was once a struggling cinema has been transformed into the spiritual home for Shanghai’s legion of animation fans. There’s evidence to be found when, after riding the escalator to the fifth floor, we’re first met by two cosplaying teenagers perfecting their moves while shooting a dance routine for Douyin. On the ground behind them are bags full of anime-themed collectibles — including some furry little recreations from the hit Chinese animation Nobody — purchased from the scores of toy stores spread out across the complex.…