Contact us

Questions about an order, a download that did not work, or a refund? Send us a message and include your order number (format: P…) so we can help faster.

Other ways to reach us

• Email: chineseunittests@issac.cc
• Order lookup & new download link: https://www.chineseunittests.com/order.php
• Refund request: https://www.chineseunittests.com/refund.php

Support hours: Monday–Friday, 09:00–18:00 (UTC+8). We are a small team — please allow up to two business days for a reply.