Shenzhen issued nearly 6 million blockchain invoices with a total value of $553 million since inception in August 2018
Source: https://cointelegraph.com/news/shenzhen-issued-6-million-blockchain-invoices-in-12-months
Shenzhen Issued 6 Million Blockchain Invoices in 12 Months
August 7, 2019
CoinTelegraph