The new democratic transition in Burma has emboldened a handful of women from this group to take the journey back to their homes in Dawmawso Township in Karenni State.
The area was under KNU control until the group reached a ceasefire agreement with the Burmese government in 2012.
A delegation of National League for Democracy lawmakers depart on a 10-day study tour in China.
Rights groups criticised the move, which they said would increase the risk of undermining political and economic reforms.
The three men were rescued from a Chonburi dock after their boat returned to shore.