天时、地利、人和(《孟子·公孙丑下》)

favorable climatic,geographical and human conditions; favorable objective and subjective factors for success; good timing,geographical convenience and harmonious human relations;opportune time,advantageous terrain and popular support(Mencius)
天时不如地利，地利不如人和；就是说只要人们和睦相处，就什么困难都能克服。Opportunity is important,what is more important is geographical location,but the most important of all is harmony among people.That means with harmony among people,we can overcome any difficulty.