WordPress MemberPress WeChat & Alipay Integration

I need WeChat Pay and Alipay added to my existing WordPress site that runs MemberPress. At the moment only PayPal is active, and I want the new gateways to sit comfortably beside it without disrupting any current membership rules or renewals.

Key requirements
• Full support for recurring payments through both WeChat Pay and Alipay, tied directly into MemberPress memberships.
• A custom-designed payment page for these two options that matches the look and feel of the rest of the site. I will share brand colours and typography once we start.
• Robust security and PCI-compliant handling of customer data. Please follow the recommended practices for tokenisation, SSL enforcement, and server-side validation.
• End-to-end setup: obtain and configure the necessary API credentials, implement the gateways, run sandbox and live tests, and provide clear hand-off documentation so I can manage refunds or plan future updates on my own.

I have developer access, staging and production sites, plus the MemberPress Developer Toolkit if you prefer to extend an existing gateway class. Let me know what additional plugins or libraries you plan to use and an outline of your approach so I can grant the right permissions quickly.