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Another thing also left a deep impression on Zhang's mind. One day on duty, he saw an elderly man riding a bicycle towards the gate. When the man went by him, he nodded and said to Zhang "Thanks for your hard work."

Any attack on a journalist who is on the line of duty in any part of the world, is an affront to the basic principles of human rights and press freedom and should strongly be condemned, said Omwoyo.

Anna Cooper, the lead researcher, said that pre-schoolers performed better than school-agand acquired skills.

Another challenge for companies using data is that they tend to simply collect data but do not use it to predict something that they don't even know, she added.

Another analyst suggested China gradually open or adjust the price of the country's refined oil products.