![The Nobel Prize laureate in chemistry Frances H. Arnold holds a chair she has signed at the Nobel Museum in Stockholm, Sweden on December 6, 2018. (Photo/Agencies)](http://www.ecns.cn/hd/2018/12/07/3e79165763fd496283e2bd13472d38d3.jpg)
The Nobel Prize laureate in chemistry Frances H. Arnold holds a chair she has signed at the Nobel Museum in Stockholm, Sweden on December 6, 2018. (Photo/Agencies)
![The Nobel Prize laureate in chemistry George P. Smith holds a chair he has signed at the Nobel Museum in Stockholm, Sweden on December 6, 2018. (Photo/Agencies)](http://www.ecns.cn/hd/2018/12/07/9ff962589ede45faa4f06075868a365d.jpg)
The Nobel Prize laureate in chemistry George P. Smith holds a chair he has signed at the Nobel Museum in Stockholm, Sweden on December 6, 2018. (Photo/Agencies)
![The Nobel Prize laureate in Physiology or Medicine Tasuko Honjo holds a chair he has signed at the Nobel Museum in Stockholm, Sweden on December 6, 2018.(Photo/Agencies)](http://www.ecns.cn/hd/2018/12/07/27e4df27f9fe4c619612a2558a8c8a45.jpg)
The Nobel Prize laureate in Physiology or Medicine Tasuko Honjo holds a chair he has signed at the Nobel Museum in Stockholm, Sweden on December 6, 2018.(Photo/Agencies)
![The Nobel Prize laureate in Physics Gerard Mourou holds a chair he has signed at the Nobel Museum in Stockholm, Sweden on December 6, 2018.(Photo/Agencies)](http://www.ecns.cn/hd/2018/12/07/7185e65d3f2c4257a245a3f30fa1ff76.jpg)
The Nobel Prize laureate in Physics Gerard Mourou holds a chair he has signed at the Nobel Museum in Stockholm, Sweden on December 6, 2018.(Photo/Agencies)
![The Nobel Prize laureate in chemistry Gregory P. Winter holds a chair he has signed at the Nobel Museum in Stockholm, Sweden on December 6, 2018. (Photo/Agencies)](http://www.ecns.cn/hd/2018/12/07/d28f551a598d4f90a75e2ae63e567d96.jpg)
The Nobel Prize laureate in chemistry Gregory P. Winter holds a chair he has signed at the Nobel Museum in Stockholm, Sweden on December 6, 2018. (Photo/Agencies)
![The Nobel Prize laureate in physics Donna Strickland holds a chair she has signed at the Nobel Museum in Stockholm, Sweden on December 6, 2018.(Photo/Agencies)](http://www.ecns.cn/hd/2018/12/07/6a681ec1604f49b4823950afdda0ccd2.jpg)
The Nobel Prize laureate in physics Donna Strickland holds a chair she has signed at the Nobel Museum in Stockholm, Sweden on December 6, 2018.(Photo/Agencies)
![Michael Ashkin, son of the Nobel Prize laureate in physics Professor Arthur Ashkin holds a chair he has signed at the Nobel Museum in Stockholm, Sweden on December 6, 2018. (Photo/Agencies)](http://www.ecns.cn/hd/2018/12/07/de7df566c7904d7e8328334bbb6c5889.jpg)
Michael Ashkin, son of the Nobel Prize laureate in physics Professor Arthur Ashkin holds a chair he has signed at the Nobel Museum in Stockholm, Sweden on December 6, 2018. (Photo/Agencies)
![The Nobel Prize laureate in economics Professor Paul M. Romer holds a chair he has signed at the Nobel Museum in Stockholm, Sweden on December 6, 2018. (Photo/Agencies)](http://www.ecns.cn/hd/2018/12/07/c174fa02414642a4b4b7aaaa006b7f86.jpg)
The Nobel Prize laureate in economics Professor Paul M. Romer holds a chair he has signed at the Nobel Museum in Stockholm, Sweden on December 6, 2018. (Photo/Agencies)
![The Nobel Prize laureate in Physiology or Medicine Professor James P. Allison holds a chair he has signed at the Nobel Museum in Stockholm, Sweden on December 6, 2018.(Photo/Agencies)](http://www.ecns.cn/hd/2018/12/07/afae6a91c8d642f9b5e0ef181f2b8b6c.jpg)
The Nobel Prize laureate in Physiology or Medicine Professor James P. Allison holds a chair he has signed at the Nobel Museum in Stockholm, Sweden on December 6, 2018.(Photo/Agencies)