Low cylinder compression x 2

#1
2009 Corolla le with 138,600 miles. I was told yesterday cylinders 3&4 have low compression. Check engine light showed a #4 misfire. Only problem I can tell is the engine misses at idle and I have to gear down on very steep hills The car feels perfect once I start driving and easily drives 70 mph on interstate. I earlier replaced #4 coil and spark plug but check engine light still on. Other than the compression problem, car is perfect. I want to keep it so I would like some feedback back on best options to repair it. New motor, junk car engine or rebuild. Mechanic said something about a company called Chinese engines that he heard good things about their engines. Thanks
 
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