It's the year 2010, hypothetically speaking,
and a 3-man crew onboard Shenzhou 10 boards
the ad hoc Chinese space-station [Shenzhou 8 and 9 linked together]
for a stay of perhaps 2 weeks or one month in orbit.
After performing medical activities, physical exercises, Earth observations,
and doing some zero-g exotic metallurgy and chemistry they return safely home.

However, the Shenzhou 8 and 9 space-station modules
remain linked up like 'sausages' in orbit and both have plenty of
propellant in their propulsion modules.
What will the Chinese do?

They may launch a modified Shenzhou 11, carrying a 2-3 person crew,
and fitted with improved radiation shielding and with a thicker heatshield,
into LEO to link up with the two other Shenzhou.

The result?

The 2-3 taikonauts, including perhaps a woman, use the propellant
onboard the three linked Shenzhou spacecraft to give them a delta vee
of perhaps 1,200-1,300 meters per second.

That would be enough to send Shenzhou 11 through the lower Van Allen
radiation belt upto an apogee of about 6,400 kilometers [4,000 miles]
above Earth's surface.
That would make the Shenzhou 11 crew the first since Apollo 17
to achieve that feat.

Speculation?
Yes.

Hypothetical?
Yes.

Doable?
If the Chinese are willing to take a less cautious step.