Syrian refugees are to take buses to return to their homeland in Lebanon's northern city Tripoli, on June 1, 2019. About 621 Syrian refugees, who gathered in different areas in Lebanon including Nabatieh, Tripoli, Beirut and Bekaa, returned to their homeland on Saturday. (Xinhua/Khalid)

Syrian refugees wait to return to their homeland in Lebanon's northern city Tripoli, on June 1, 2019. About 621 Syrian refugees, who gathered in different areas in Lebanon including Nabatieh, Tripoli, Beirut and Bekaa, returned to their homeland on Saturday. (Xinhua/Khalid)

Syrian refugees wait to return to their homeland in Lebanon's northern city Tripoli, on June 1, 2019. About 621 Syrian refugees, who gathered in different areas in Lebanon including Nabatieh, Tripoli, Beirut and Bekaa, returned to their homeland on Saturday. (Xinhua/Khalid)

Syrian refugees wait to return to their homeland in Lebanon's northern city Tripoli, on June 1, 2019. About 621 Syrian refugees, who gathered in different areas in Lebanon including Nabatieh, Tripoli, Beirut and Bekaa, returned to their homeland on Saturday. (Xinhua/Khalid)

Syrian refugees wait to return to their homeland in Lebanon's northern city Tripoli, on June 1, 2019. About 621 Syrian refugees, who gathered in different areas in Lebanon including Nabatieh, Tripoli, Beirut and Bekaa, returned to their homeland on Saturday. (Xinhua/Khalid)