The phrase "after longstanding" is not correct in English as it is incomplete and lacks context.
It can be used in contexts where you want to refer to something that has been in place for a long time, typically followed by a noun or a specific event.
Example: "After longstanding discussions, the committee finally reached a consensus."
Alternatives: "following prolonged" or "after extended".
A year earlier, the Bush administration had succeeded in getting law schools, including Harvard, to allow recruiters on campus after longstanding refusals to do so because of the ban on gays in the military.
In 2005, the authorities allowed the renminbi to strengthen modestly after longstanding accusations by governments around the world that China was keeping its currency artificially weak to increase its exports.
The shift in S.E.C. policy to seek admission of wrongdoing comes after longstanding criticism that the agency was too soft on large organizations at the heart of the financial crisis.
The first and most intriguing is the Criterion Center in Times Square, the former home of the Roundabout Theater Company, which left in June after longstanding conflicts with the building's owner, Charles B. Moss Jr.
Homing in on root causes, said Daron Shaw, a political scientist who was a campaign strategist for President George W. Bush, fits the public mood after longstanding governmental failures on all those issues.
This signals an urgent need for new treatments that will improve repair and recovery after longstanding injuries.
But Anwar returned to prison in 2015 after his longstanding conviction — for allegedly sodomising a former aide — was upheld.
Ms. Hu, 56, resigned in November after a longstanding dispute with Caijing's publisher over business and editorial matters, including the aggressive journalism she championed.
In January, Mayor Michael R. Bloomberg and Gov. Eliot Spitzer said a dramatic downturn in the economy was forcing them to reduce the amount of money they had planned to spend on schools after a longstanding education financing lawsuit was settled last year.
After a longstanding policy of neutrality between Europe's great powers, the bitter experience of invasion and occupation during World War II led the Netherlands to become a leading supporter of international cooperation.
Ports along the West Coast reopened Tuesday after a longstanding labor dispute led companies that operate the shipping terminals to lockout most of their dockworkers over the weekend, restricting the loading or unloading of cargo from idling ships and causing severe slowdowns in operations.
