Chinese fast-fashion platform Shein has relaunched in India through a partnership with local conglomerate Reliance’s retail chain, nearly five years after it was banned amid diplomatic tensions between New Delhi and Beijing. The new Shein India Fast Fashion app, developed and launched by billionaire Mukesh Ambani’s Reliance Retail, marks the firm’s significant return to one of Asia’s largest retail markets ahead of the Chinese firm’s much-anticipated listing later this year. The app’s revival comes under stringent conditions that give Reliance complete control over operations and data. Under the partnership structure — disclosed recently by India’s commerce ministry — Shein will…