Pink Enamel bowl of Yongzheng of Qing dynasty

[john8888]

How we can tell the different the enamel bowl from Yongzheng of Qing dynasty and the early 1921-1931? Because they copied enamel bowls during those years?
Second, number of kicks can tell? In enamel item the key evaluation is the kicks. If there are lots small kicks in the color zone that indicating it is old enamel ceramic instead a fake one. 
Third, the signature of bottom has a special regulation in enamel ceramics in Qing dynasty. So it is right signature at this bowl?