Which retail technology adaptation helped Walmart successfully expand into China despite initial failures?

In the world of retail, geographic expansion strategies can make or break a brand's global presence. Companies must carefully consider local market preferences, regional shopping behaviors, and location-specific merchandising. This trivia question explores how a major retailer successfully adapted its point-of-sale systems to accommodate geographic and cultural differences in a challenging market.

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Implementation of region-specific mobile payment systems (WeChat Pay and Alipay) at all POS terminals
Creation of RFID-only stores with no human cashiers
Elimination of all digital payment options in favor of cash-only transactions
Implementation of blockchain-based inventory systems with QR code verification