The artistic signatures of Zhou Sijie and Huang Jialing do not need permanent mobile phones. Zhou Sijie/7lswddw5 _ xn3otqbpnn2djv/Andar/PIC/Item/FFA0A93430D51fe7d1A23E8.jpg.
/7lswddw5 _ xn3otqbpnn2djv/andar/pic/item/e445c91b3deea40b8127bee.jpg from Huang Jialing.