Terms

One-time course purchase

You buy the selected course edition once at the checkout total. No subscription, automatic renewal, membership billing or future charge is created. Cloud-provider services and their charges are not included.

Delivery

After the payment provider confirms payment, written lessons become available through My courses using the checkout account. Course editions are available while this learning service operates; this is not a promise of perpetual hosting or future editions. If payment succeeds but access is missing, contact support with the order number before paying again.

Personal use and examples

The written course materials are for the purchaser’s personal learning and may not be redistributed or resold. Included example code may be adapted for your projects; review it before production use. No employment, income or deployment outcome is guaranteed.

Account and disputes

Keep account details accurate. Contact support for access issues, complaints or a refund request. Applicable mandatory consumer rights remain unaffected.

Site operator: Hengyang Baiyao Technology Co., Ltd.

002285, Building A, Innovation Center, Zhengxiang District, Hengyang City.

Contact: cs@wenravo.com

+852 49093353