In a video interview with an independent filmmaker before her arrest, Ms Zhang said she decided to travel to Wuhan in February after reading an online post by a resident about life in the city during the outbreak.
Once there, she began documenting what she saw on the streets and hospitals in livestreams and essays, despite threats by authorities, and her reports were widely shared on social media.
The rights group Network of Chinese Human Rights Defenders said her reports also covered the detention of other independent journalists and the harassment of families of victims who were seeking accountability.
Hellbound and Down 