After Xu Cheng and Huang Ying were detained in the detention center for 48 hours, they were temporarily released on bail.
The main reason the police arrested Eric was because of the murder. The mastermind was Eric. At most, Huang Ying and Xu Cheng knew about it but didn't report it, so their charges weren't very heavy and they were allowed to be released on bail.
As for the case of Xu Cheng, Huang Ying, and Eric conspiring to defraud Lina and seize Lina's assets, it belonged to another category. Moreover, Huang Ying and Xu Cheng were accomplices, so naturally their charges weren't as heavy as Eric's.
The two of them used all their savings to bail themselves out. Now, they only had less than 500 yuan left on them. This was the last money that they had.