F-117 wreckage bought by China used to help develop J-20?

via Fox News...

First this---

"At the time, our intelligence reports told of Chinese agents crisscrossing the region where the F-117 disintegrated, buying up parts of the plane from local farmers," says Adm. Davor Domazet-Loso, Croatia's military chief of staff during the Kosovo war.
"We believe the Chinese used those materials to gain an insight into secret stealth technologies ... and to reverse-engineer them," Domazet-Loso said in a telephone interview.
A senior Serbian military official confirmed that pieces of the wreckage were removed by souvenir collectors, and that some ended up "in the hands of foreign military attaches."

Then this---

Zoran Kusovac, a Rome-based military consultant, said the regime of former Serbian President Slobodan Milosevic routinely shared captured Western equipment with its Chinese and Russian allies.
"The destroyed F-117 topped that wish-list for both the Russians and Chinese," Kusovac said.
Russia's Sukhoi T-50 prototype stealth fighter made its maiden flight last year and is due to enter service in about four years. It is likely that the Russians also gleaned knowledge of stealth technology from the downed Nighthawk.

Hmm.

Either a viable counter measure to stealth already exists with earlier generations of stealth----or those airplanes (the escorts for the B-2's) were flying missile pickets or expendable targets if the jamming didn't work.

I would pay good money to hear what the escorting pilots briefing was before those missions.