Yesterday, I received your complaint letter about the noise issue on last Friday. First of all, I would like to apologise for the inconvenience caused. I had invited a few of our family friends to celebrate my wife 1st year work anniversary at our home. We had this plan in a hurry, so invited only limited people. We started late, which has ended little longer than expected. I understand that this would've caused inconvenience to some extent because our kids and friends' children met after a long time, so they were playing around and making noise with no rest. We have tried our best to control them, but we never realised that it could disturb as they were playing in the last room which has good insulation of sound. We would like to thank for your understanding and sorry for this issue. We will not let this happen again, especially late night with kids around.