Automatic Investment on ABC H Share

$ABC (01288.HK)$ I have been continuously buying ABC H share on monthly basis over the past few months, by investing a small portion (~15%) of my salaries as a deposit. My evaluation of ABC H share by DDM model is ~hk$ 3.65 under conservative assumption and ~hk$ 3.95 under neutral assumption with current fx rate. The target investment horizon is mid-to-long term. Current high dividend rate plays as a good shield against the uncertainties. The auto-investment will pause if the dividend rate is no longer attractive for me (like less than 7%) and will gradually start to exit when it reaches the target prices.