diff --git a/dcloud-renew/README.md b/dcloud-renew/README.md
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+```
+npm i
+npx playwright install-deps
+npx playwright install chromium
+HEADLESS=true node renew.mjs 'email' 'password'
+```
+
+add to crontab to run automatically:
+
+```
+# Renew DCloud uniCloud free-tier subscriptions.
+# Runs at 1:00 on the 26th of every month.
+#
+# Install with:  crontab /Users/Shared/product-产品/opx/sysconfig/dcloud-renew/crontab.txt
+# (That replaces your whole crontab; use `crontab -e` to merge with existing entries.)
+0 1 26 * *  /Users/Shared/product-产品/opx/sysconfig/dcloud-renew/renew-all.sh >> /tmp/dcloud-renew.log 2>&1
+```