网友们纷纷上传自己模仿张一山手势的照片。有人做到了，但有人却表示根本做不到。

“秋水誓”的劲头还没过，央视主持人李思思一条微博，又将挑战升级到高阶版。她将五指交缠打成结，不过这手指的柔韧性也太好了吧，已经快要把手指拧成麻花了。

Li Sisi posted a picture on her Weibo account, which showed her interlocking her digits to form the shape of a knot.

李思思在微博上发布了一张照片，照片中她的五个手指互相交缠形成一个结。

Ms Li's followers immediately joined in and shared pictures of them taking on the challenge in the comments.

她的粉丝迅速参与其中，在评论区上传自己的挑战照片。

They said 'finger knot' was easier to achieve, however the catch was to do the trick with just one hand.

粉丝们表示，这个手势相对容易完成，但是单手做就很难。

Medical experts, however, warned that people should not force themselves to hold these positions if they find them difficult.

但是医生提醒民众，如果觉得困难，就不要勉强自己来做这些手势。

According to Dr Jane Simmonds, a registered physiotherapist at University College London, those who could perform the difficult finger tricks are likely to have joint hypermobility, a common phenomenon present in 20 to 30 percent of the general population.

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