People in Shanghai react to the escalating trade war between the US and China, the world's two biggest economies. China announced it would impose tariffs on imports of US energy, vehicles and equipment, firing a return salvo after US President Donald Trump on Saturday revealed sweeping measures against major trade partners Canada and Mexico, with goods from China hit with an additional 10 percent tariff on top of the duties they already endure. "China is also a big country. We can't let them casually bully us," says Karen Zhang, while 48-year-old Nian believes, "I think it is good. We will be autonomous. We will be better." IMAGES AND SOUNDBITES