Trang, 43, was detained hours after an annual US-Vietnam human rights dialogue in October last year, an arrest the US embassy said could impact freedom of expression.
Dang Dinh Manh, another member of her legal team, said the nine-year sentence was severe.
“The sentence is too long. The judges insisted that Trang’s activities were dangerous for society and for the administration,” Manh said.
Phil Robertson, deputy Asia director at Human Rights Watch, called the verdict an unacceptable sentence for a brave woman who only spoke her mind.
“The imprisonment of such a committed reformer dedicated to promoting human rights, good governance and justice is a searing indictment of everything that is wrong with authoritarian Vietnam today,” Egli ha detto.
“In a democratic society, Trang’s prolific ideas and writings would be admired and extolled rather than criminalized.”
A maggio 2016, police detained and prevented Trang from attending a meeting with then-US President Barack Obama, who had invited her to join him at an activists’ Forum.
Due anni dopo, she was detained after meeting with a European delegation that was preparing for an annual EU-Vietnam human rights dialogue.