A video showing legions of elderly people power-walking at the middle of the street in the coastal city of Qingdao has gone viral.

　　One would have thought the middle of the street is for vehicles to go through. Why would the elderly occupy the middle of the street?

　　Topic2- Are mosquito coils making us sick?

　　Mosquitos can be one's number one enemy in a hot summer day, yet stories about mosquito-repellent incense are harmful to human health worry users who are desperate to keep the mosquito away.

　　How can we avoid mosquito bites? What are the alternatives? Let's find out now!