Contestants tap mock rubber trees during the final round of a rubber tapping contest as part of a national vocational skills competition for agricultural practitioners, in Haikou, south China's Hainan Province, Oct. 21, 2024. A total of 70 contestants attend the final round held here on Monday. (Xinhua/Pu Xiaoxu)

A contestant taps a mock rubber tree during the final round of a rubber tapping contest as part of a national vocational skills competition for agricultural practitioners, in Haikou, south China's Hainan Province, Oct. 21, 2024. A total of 70 contestants attend the final round held here on Monday. (Xinhua/Pu Xiaoxu)

A contestant taps a mock rubber tree during the final round of a rubber tapping contest as part of a national vocational skills competition for agricultural practitioners, in Haikou, south China's Hainan Province, Oct. 21, 2024. A total of 70 contestants attend the final round held here on Monday. (Xinhua/Pu Xiaoxu)

A contestant taps a mock rubber tree during the final round of a rubber tapping contest as part of a national vocational skills competition for agricultural practitioners, in Haikou, south China's Hainan Province, Oct. 21, 2024. A total of 70 contestants attend the final round held here on Monday. (Xinhua/Pu Xiaoxu)

A contestant taps a mock rubber tree during the final round of a rubber tapping contest as part of a national vocational skills competition for agricultural practitioners, in Haikou, south China's Hainan Province, Oct. 21, 2024. A total of 70 contestants attend the final round held here on Monday. (Xinhua/Pu Xiaoxu)

A referee (R) keeps time during the final round of a rubber tapping contest as part of a national vocational skills competition for agricultural practitioners, in Haikou, south China's Hainan Province, Oct. 21, 2024. A total of 70 contestants attend the final round held here on Monday. (Xinhua/Pu Xiaoxu)