This is not the case in TV series, it is the need of the plot. Two tigers are not allowed in one mountain. Zhao Min is the heroine of this TV series, so we must beautify her existence and spread correct values.

The existence of Zhou Zhiruo is to set off the existence of Zhao Min. In a play, there must always be a distinction between primary and secondary, otherwise there will be no main line and it will be a mess.