Background SARS-CoV-2 has caused a pandemic. Control measures differ among countries. It is necessary to assess the effectiveness of these control measures. Material/Methods We collected the data of COVID-19 patients and control measures between January 18, 2020 and September 18, 2020 from the Changshou District and analyzed the clinical characteristics, epidemiological data, and the adjustment of policies to assess the effectiveness of control measures. The control of COVID-19 was divided into 2 stages, with the lifting of lockdown in Hubei province (March 25, 2020) as a dividing line. Results We identified 32 patients through different means in the first stage. All the imported patients entered this area before the lockdown. In 93.1% of patients, the last exposure occurred before the implementation of the stay-at-home order and centralized isolation. Tracing of high-risk people and RT-PCR screening identified 56.3% of cases. In the second stage, all the high-risk people were under centralized isolation. Nine asymptomatic patients were identified. City lockdown and stay-at-home orders were not issued again, and no second-generation patients were found. Conclusions We have provided a successful model to control the transmission of COVID-19 in a short period.

This article investigates the role of grandparents in Mandarin Chinese retention by children in Saskatchewan, Canada. The materials for the study come from interviews with 60 Mandarin Chinese/English bi-multilingual children between the ages of 6 and 13 in the families of immigrants from China residing in Saskatchewan, Canada. Additional materials describing bilingual children's Mandarin language proficiency come from a picture description as well as Chinese characters reading and writing tasks. The interview responses and language proficiency parameters were analyzed with the help of correlation analysis, chi-square (for nonparametric data) and univariate ANOVAs (for parametric data). The results are highly controversial, as on the one hand, they demonstrate that the presence of grandparents residing in the same household as their grandchildren is associated with the grandchildren having fewer non-canonical forms (NCFs referred to in earlier research as errors) in their narratives and fewer phonological NCFs. On the other hand, children who have grandparents residing with them are more likely to have a lower ability to read Mandarin texts with PinYin, spend fewer hours reading in Mandarin, produce more incomplete sentences per utterance, and shorter narratives.