Which major retail innovation did Walmart implement specifically for its expansion into China that differed significantly from its US stores?

In the ever-evolving world of retail, geography plays a crucial role in how companies expand and adapt their products. This trivia question explores how one of the world's largest retailers tailored its geographic expansion strategy to local markets, creating a fascinating case study in global retail adaptation. Test your knowledge of how international retail giants navigate cultural and geographical differences!

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Live fish tanks in grocery departments where customers can select fresh seafood
Automated robotic checkout systems that recognize customers by facial recognition
Solar-powered shopping carts with built-in navigation systems
Designated shopping assistants assigned to each customer upon entry