You were hearing CNR1 from 1255 to 1300 UT, which is used to jam the Sound of Hope (Taiwan) signal.
They normally stop for a brief time at the top-of-the-hour, apparently to check if the station they are
jamming is still there and then they start up jamming again. The time pips at 1300 were definitely from
CNR1, which ALWAYS has pips at ToH, while SOH NEVER has time pips at ToH. The "weak unreadable"
station you heard after CNR1 went off the air, must in fact have been SOH.
SOH has a top-of-the-hour ID of "Xiwang zhi sheng guoji guangbo diantai" (Sound of Hope international
broadcast station), given twice (once by OM and once by YL). My audio of a typical ToH SOH ID format is
posted at
https://app.box.com/s/s90u44t1lmxf8t2cv9csjacxbdj4v4z3 , with the ID at 2:30 on the audio clip
and note NO TIME PIPS.
Hope this helps.