Merge pull request #5 from snowzjx/branch_xc

Branch xc
Merge pull request #6 from snowzjx/branch_xc

Add sql script for initializing tables.
Prepare to merge.
Merge remote-tracking branch 'origin/master' into branch_snowzjx
Delete unused folder.
Merge pull request #7 from snowzjx/branch_snowzjx

Branch snowzjx
Merge pull request #8 from snowzjx/branch_xc

Branch xc
Merge remote-tracking branch 'origin/master' into branch_xc
amend sql script