And it's normal that we'll feel strange at the first place, because that's our first contact, and strangely, in the first time, the impression will be particularly impressive, like the first time we learned to ride a bicycle, there are always bumps and bumps, impressed, or non-stop practice, sometimes encounter setbacks, we think about moving forward , Break through any difficulties, after a long time will ride a bicycle, feel no feeling, but always recall the beginning of learning to ride a bicycle memories