"The blow to our economy is comprehensive," Paul Chan wrote, adding that upcoming economic data later this week will trigger a technical recession.

"The government will be announcing its advance estimates for the third quarter on Thursday. After seeing negative growth in the second quarter, the situation continued in the third quarter, meaning our economy has entered technical recession," Chan wrote.

"It seems it will be extremely difficult for us to reach full-year economic growth of 0 to 1%. I would not rule out the possibility that the full-year economic growth will be negative."

Protesters have frequently shut down popular shopping districts, something that we outlined last week, warning that the retail industry in Hong Kong is on the brink of collapse.