By Mimosa Spencer PARIS (Reuters) – Birkin bag maker Hermes is opening a new, enlarged store in China’s Nanjing city, signalling the luxury industry’s confidence in a strong return of Chinese shoppers after three years of tough COVID-19 restrictions. Hermes, which first opened a store in the city in 2010, has now relocated to the upscale mall Deji Plaza, with a wider product selection spread across two floors, from silk scarves to leather goods, as well as home decor, jewellery and clothing. European luxury houses have continued to invest in China, expected to become the sector’s largest marke…