high temperature when running OS X Mojave on the Lenovo G400s intel core i5 3230M

Lenovo g400s laptop specifications:

Onboard Processor: Intel® Core ™ i5-3230M Processor 2.60 GHz (2 core)
RAM Memory: 2 * 4GB DDR3 PC-12800 Max. Memory: 8GB (2 DIMMs)
GPU Intel HD Graphics 4000
Screen Size: 14 ″ WXGA LED Max. Screen Resolution: 1366 x 768 Screen Technology: LED
Audio: Dolby Advanced Audio v2
SSD Drive Type: Adata 250 gb
IEEE 802.11b Wireless Network Protocol, IEEE 802.11g, IEEE 802.11n
Bluetooth: 4.0
os: OS X Mojave version 10.14.5
my problem is when I turn on my laptop for...

high temperature when running OS X Mojave on the Lenovo G400s intel core i5 3230M