My phone is not powering on

once i kept my phone for charging at night and when i woke up the phone is not turning on i tried by plugging it to charger but then also no use i really dont know what to do please tell me any solution i have so many datas kept in my phone and my phone is lenovo a7000

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 4
crwdns2934285:0crwdne2934285:0