On September 6, 2019CITPV China international pv technology BBS BBS -- high efficiency component technology BBS was held in hangzhou. Technical experts from the photovoltaic industry at home and abroad, scientific research institutions, photovoltaic enterprise technology researchers gathered together to discuss the industrialization and future development trend of efficient components and packaging technologies such as black silicon, large silicon wafer, new generation of PERC, double-sided, etc.