A 32-hour visit to Hong Kong by JPMorgan chief executive Jamie Dimon has drawn attention to how shut-off the Chinese financial hub has become after two years of keeping coronavirus cases at bay.

Dimon’s visit — the first known trip to the city by the head of a Wall Street bank since the beginning of the pandemic — came just days after Hong Kong tightened its quarantine rules to remove previous exemptions for travelers including top international financial executives.