All the C830C's "Please do not lean on the train doors" is changing to "Please do not lean against the train doors" so that it will will become like C830
Also, last time, when it came to interchange stations with NSL, EWL or NEL, the interchange announcement was like this, "Passengers who are continuing the journey on.....pls alight at the next station" while for interchange stations with DTL, the Announcements is like this, "Change at the next station for the Downtown Line." Now, its interchange Announcements is now like this for all interchange stations, "Change at the next station for the....."