Chinese authorities have intensified efforts to collect taxes from citizens earning income from overseas investments, part of a broader campaign to curb cross-border trading that circumvents capital controls.

On Tuesday, six local tax bureaus, including those in Beijing and Shenzhen, issued nearly identical statements saying they had “reminded and coached” certain citizens to report their overseas income and settle any outstanding taxes. Officials noted that big data analysis was used to identify individuals.

The move signals that Chinese authorities are maintaining pressure on offshore trading and capital flight, even as Beijing seeks additional revenue sources to narrow a record budget deficit. The push comes amid a slowdown in land sale income and tighter leverage rules for local governments.