Below is an example of color coded corrections.  The final corrected text is also shown.

After Tthe World Health Organization (WHO) removed Hong Kong from its list of SARS-infected areas after when the city recorded zero infections for 20 consecutive days, China opened the gate for its people to visit Hong Kong in order to help Hong Kong’s economic recovery. In fact, tourism helpsed Hong Kong to recover the lost of the past past losses and making made it to become a more beautiful city.

            After the WHO removed Hong Kong from its list of SARS-infected areas when the city recorded zero infections for 20 consecutive days, China opened the gate for its people to visit Hong Kong in order to help Hong Kong’s economic recovery. In fact, tourism helped Hong Kong recover past losses and made it a more beautiful city.