Huànnànjiànzhēnqíng, tā yìzhí dōu zài wǒ shēnbiān.
You see true friendship in hard times, he has always been by my side.
Tips
usage
The Chinese equivalent of 'a friend in need is a friend indeed'. Use it to praise someone who stuck with you through illness, bankruptcy, divorce, or other low points; saying it to a fair-weather friend is pointed criticism.