Annual tree climbing event held in Canberra, Australia
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A coach teaches skills to a child competitor during an annual tree climbing event at the Australian National Botanic Gardens in Canberra, Australia, May 4, 2019. (Xinhua/Chu Chen)

A competitor takes part in an annual tree climbing event at the Australian National Botanic Gardens in Canberra, Australia, May 4, 2019. (Xinhua/Chu Chen)

A child competitor takes part in an annual tree climbing event at the Australian National Botanic Gardens in Canberra, Australia, May 4, 2019. (Xinhua/Chu Chen)

A child competitor takes part in an annual tree climbing event at the Australian National Botanic Gardens in Canberra, Australia, May 4, 2019. (Xinhua/Chu Chen)

A competitor takes part in an annual tree climbing event at the Australian National Botanic Gardens in Canberra, Australia, May 4, 2019. (Xinhua/Chu Chen)