Several links:
jira download link (jira official may block domestic ip, please use proxy):
https://www.atlassian.com/software/jira/download-archives
confluence download link (please use proxy ):
https://www.atlassian.com/software/jira/download-archives confluence download link /www.atlassian.com/software/confluence/download-archives
Official integration documentation (not using crowd):
https://confluence.atlassian.com/doc/integrating-jira-and-confluence-2825.html
using jira6. 3.6 + confluence 5.9.6 builds all OK.
Please google it by yourself if you want to crack, Chinese, etc.