Volunteer Katrin Beyer shows the baby hatch named "Mother's Moses Cradle" in Anvers, Belgium, on Dec. 12, 2013. (Xinhua/Ye Pingfan)

Volunteer Katrin Beyer shows the baby hatch named "Mother's Moses Cradle" in Anvers, Belgium, on Dec. 12, 2013. (Xinhua/Ye Pingfan)

Volunteer Katrin Beyer shows a letter and half piece of a keepsake card to abandoned babies' parents in front of the baby hatch named "Mother's Moses Cradle" in Anvers, Belgium, on Dec. 12, 2013. (Xinhua/Ye Pingfan)

Volunteer Katrin Beyer shows the baby hatch named "Mother's Moses Cradle" in Anvers, Belgium, on Dec. 12, 2013. (Xinhua/Ye Pingfan)

Volunteer Katrin Beyer shows half piece of a keepsake card to abandoned babies' parents in front of the baby hatch named "Mother's Moses Cradle" in Anvers, Belgium, on Dec. 12, 2013. (Xinhua/Ye Pingfan)

Volunteer Katrin Beyer shows how to open the baby hatch named "Mother's Moses Cradle" in Anvers, Belgium, on Dec. 12, 2013. (Xinhua/Ye Pingfan)

Volunteer Katrin Beyer arranges the baby hatch named "Mother's Moses Cradle" in Anvers, Belgium, on Dec. 12, 2013. (Xinhua/Ye Pingfan)

Volunteer Katrin Beyer passes through a door of a house where the baby hatch named "Mother's Moses Cradle" locates in Anvers, Belgium, on Dec. 12, 2013. (Xinhua/Ye Pingfan)

The baby hatch named "Mother's Moses Cradle" is seen in Anvers, Belgium, on Dec. 12, 2013. (Xinhua/Ye Pingfan)

Volunteer Katrin Beyer shows the method of putting babies into the hatch named "Mother's Moses Cradle" in Anvers, Belgium, on Dec. 12, 2013. (Xinhua/Ye Pingfan)