22. Earnings per share

Earnings per share are calculated by dividing the net income attributable to ordinary shareholders by the weighted average number of ordinary shares issued and outstanding during the year, excluding the weighted average number of ordinary shares purchased by the Group and held as treasury shares.

For diluted earnings per share, the weighted average number of ordinary shares issued is adjusted to assume conversion of all potentially dilutive ordinary shares (see Note 3). The Group has considered the share options granted to the management to calculate the potentially dilutive ordinary shares.