Locals may not even speak honestly but will try to say what they think you want to hear. This is not done maliciously and an element of patience and understanding will ease the situation. Chinese people are courteous but reserved and politeness is appreciated at all times. Confrontation is not appreciated and will only worsen rather than resolve any situation. Photography is not restricted around tourist areas but it is worth noting that taking photographs is not allowed in airports and permission should be gained before snapping away at any government or military bases.
Many countries have representative offices and consulates in China.