Frequency changes of Voice of Tibet on May 20

TAJIKISTAN(non)   Frequency changes of Voice of Tibet on May 20:
1230-1236 on 11661 DB  100 kW / 131 deg to CeAs Tibetan, ex  9899
1236-1242 on 11661 DB  100 kW / 131 deg to CeAs Tibetan, ex  9886
1242-1300 on 11661 DB  100 kW / 131 deg to CeAs Tibetan, ex  9876
1300-1305 on  9899 DB  100 kW / 131 deg to CeAs Tibetan, ex  9886
1305-1311 on  9891 DB  100 kW / 131 deg to CeAs Tibetan, ex  9876
1311-1334 on  9884 DB  100 kW / 131 deg to CeAs Tibetan, ex  9876
1330-1400 on  9826 DB  100 kW / 131 deg to CeAs Tibetan unchanged
1334-1400 on  9876 DB  100 kW / 131 deg to CeAs Tibetan unchanged
https://www.youtube.com/watch?v=cgGPii5jgyQ&feature=youtu.be
https://www.youtube.com/watch?v=mQQDo7HhuGM&feature=youtu.be
https://www.youtube.com/watch?v=l7VRPG91eXo&feature=youtu.be
https://www.youtube.com/watch?v=PK1vHKEDgUs&feature=youtu.be