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there was a book I read years ago called "Green Leaf in Drought Time" about a missionary famiy which was stranded in China when missionaries in general were all kicked out; it's a great read if you can find it (maybe on amazon?); if I remember correctly this was the Psalm that gave them the hope to keep pressing forward in the very difficult time.

Thank you for sharing this, a good inspiration for us to follow. Blessings!