Twin brothers pick up row of knocked-over bikes

<p>A pair of twins saw an entire row of bicycles fall to the ground, and ran to stand them back up one by one.</p><p>Their mother said it took them more than 20 minutes to get all done. One brother hurt his hand. However, the boy said they were doing what should be done.</p><p><span style="color: rgb(127, 127, 127);">(Produced by Zhu Yaze and Dong Feng)<br/></span></p><p><br/></p>