According to the rule of Zhenguan from 627 to 649, poets such as Yu Shinan, Wang Ji, Shangguan Yi, Hanshan, Lu and Luo were born in 627. Du (he should be 4 years old at the end of Zhenguan) and Su Weidao (he was 1 year old at the end of Zhenguan).
Wang Bo and others behind should be unable to catch up with the rule of Zhenguan.