A Beijing coffee shop displays a sign for China's digital yuan, or E-CNY. VCG/VCG via Getty Images Two Chinese state-run banks are looking to expand usage of China's experimental digital yuan. China Construction Bank is working on allowing e-yuan holders to make online fund investments. Trials of China's CBDC logged $5.3 billion of transactions as of June. See more stories on Insider's business page . To expand usage of China's experimental digital currency, two state-run banks are looking into allowing customers to use the asset to buy investment funds and insurance products, according to a South China Morning Post report...