Wu Boyao was diagnosed with Parkinson’s disease 26 years ago. Now 86, he lives with his wife and one of their two daughters in a suburb straddling the border between the eastern Chinese cities of Shanghai and Suzhou.Originally from Shanghai, they moved to the area – which is administered by Suzhou – in search of a larger home. The trade-off was that Wu would no longer qualify for home care service sessions that were almost free.A decade ago, Shanghai was one of the first cities in China to...