num_to_china/views/num_to_china.xml
<?xml version="1.0" encoding="UTF-8"?>
<openerp>
<data>
<template id="assets_backend" name="osbzr_assets" inherit_id="web.assets_backend">
<xpath expr="." position="inside">
<script type="text/javascript" src="/num_to_china/static/src/js/num_to_china.js"/>
</xpath>
</template>
</data>
</openerp>