They chop and change, appear and then disappear, sometimes you hear Chinese voices chatting away on the frequencies rather than the CW scheduled, all adds to the mystery:
3.777MHz CW 1505z V M8JF M8JF M8JF de RIS9 RIS9
4.532MHz CW 1440z V M8JF M8JF M8JF de RIS9 RIS9
4.609MHz CW 1610z V FIK3 FIK3 FIK3 de H4JH H4JH
6.840MHz CW 1419z VVV Q2M Q2M Q2M de NYZ NYZ QSA? K
8.940MHz CW 1400z VVV VYU VYU VYU de LMO LMO
10.178MHz CW 0945z V FIK3 FIK3 FIK3 de H4JH H4JH