how to run cmd from batch file and go to folder within parent folder

Question

I have to create a batch file as below

1) It will run cmd
2) then withing that command prompt goes back to parent folder may be with cd..
3) then go to folder jar may with cd jar
4) run command java -jar TASKApi.jar

and this command prompt should remain open

currently I am using below code

start cmd.exe /k cd..
cd jar
java -jar TASKApi.jar 

But only first line works other two line does not
Please tell me how can I do this

Solution

Edited after a comment below:

:: two.bat
@echo off
cd /d "c:\folder\jar"
java -jar "TASKApi.jar" 

To keep the console window open for further input, launch the batch file above from another batch file.

:: one.bat
@echo off
cmd /k call two.bat