How long will it take for new forests to grow back?

The environmental group the WWF says it will take at least two decades for new forests in areas of Greece destroyed by recent fires to grow back. The fires which killed 65 people raged across much of southern Greece in August. The WWF director in Greece Dimitris Karavellas told BBC that they would establish a group of lawyers to intervene if lands developers try to take advantage of the disaster.
Question: How long will it take for new forests to grow back?

China says five Chinese citizens kidnapped in southern Nigeria earlier this month have been freed. The Chinese Foreign Ministry said the hostages were rescued on Wednesday. The five Chinese are telecommunications workers. They were kidnapped from their temporary home in the oil-rich Niger Delta area on January fifth.
Question: When were the five Chinese kidnapped?