Dial 930 to save the forest
The sign was posted by the Forestry Bureau encouraging people to report forest fires. The choice of phone numbers includes some easy to remember mnemonics. 000 is pronounced as líng líng líng in Mandarin. This sounds similar to 林林林 (lín lín lín) which means forest forest forest. 930 is pronounced jiǔ sān líng in Mandarin. This sounds similar to 救山林 (jiù shānlín) which means save the forest.
The photo was taken on Dadu Shan (大肚山) in Taichung.