微信h5内如何通过后端返回的支付宝form表单拉起支付宝支付

<form name="punchout_form" method="post" action="https://openapi.alipay.com/gateway.do?charset=UTF-8&method=alipaMTESTPAC20240509105151984779429&notify_url=http%3A%2F%2Ftest2horuswechatapp.kyv5.com%2FaliPay%2Fsign%2Fnotify&version=1.0&app_id=2021004101687458&sign_type=RSA2&timestamp=2024-05-09+10%3A51%3A52&alipay_sdk=alipay-sdk-java-4.35.150.ALL&format=json">↵<input type="hidden" name="biz_content" value="{"access_params":{"channel":"ALIPAYAPP"},"external_agreement_no":"M2MTESTRE20240509105151995842230&quriod_type":"DAY","single_amount":"1.00","total_payments":60},"personal_product_code":"CYCLE_PAY_AUTH_P","product_code":"GENERAL_WITHHOLDING","sign_scene":"INDUSTRY|DEFAULT_SCENE"}">↵<input type="submit" value="立即支付" style="display:none" >↵</form>↵<script>document.forms[0].submit();</script>

后端返回一个这样的支付宝form 怎么才能在微信h5内拉起支付宝支付