兰兰和冬冬是一对姐弟，她们在上海康健幼儿园，父母在北京工作。一天，幼儿园老师告诉兰兰和冬冬她们的妈妈要接他们回去，姐弟俩十分高兴，但由于妈妈工作忙，幼儿园只得请铁路代为运送，铁路局安排郑大光来照顾他们。
遇播放卡顿或无法播放时，可切换线路播放
'%3e%3cpath%20fill-rule='evenodd'%20clip-rule='evenodd'%20d='M12%205.54358C14.7301%205.54358%2017.0344%207.36702%2017.7613%209.86248C19.6535%2010.5747%2021%2012.4019%2021%2014.5436C21%2017.305%2018.7614%2019.5436%2016%2019.5436H7C4.79086%2019.5436%203%2017.7527%203%2015.5436C3%2013.6789%204.27588%2012.1123%206.00225%2011.669L6%2011.5436C6%208.22987%208.68629%205.54358%2012%205.54358Z'%20stroke='%23333333'%20stroke-opacity='0.9'%20style='stroke:%23333333;stroke-opacity:0.9;'%20stroke-width='1.5'%20stroke-linejoin='round'/%3e%3cpath%20d='M11.75%209.54358C12.1642%209.54358%2012.5%209.87937%2012.5%2010.2936V14.0436H14.25C14.6642%2014.0436%2015%2014.3794%2015%2014.7936C15%2015.2078%2014.6642%2015.5436%2014.25%2015.5436H11.75C11.3358%2015.5436%2011%2015.2078%2011%2014.7936V10.2936C11%209.87937%2011.3358%209.54358%2011.75%209.54358Z'%20fill='%23333333'%20fill-opacity='0.9'%20style='fill:%23333333;fill-opacity:0.9;'/%3e%3c/g%3e%3cdefs%3e%3cclipPath%20id='clip0_4593_22613'%3e%3crect%20width='24'%20height='24'%20fill='%23333333'%20style='fill:%23333333;fill-opacity:1;'%20transform='translate(0%200.543579)'/%3e%3c/clipPath%3e%3c/defs%3e%3c/svg%3e)
